chore(deps): bump github.com/open-policy-agent/opa from 0.65.0 to 0.67.1

Bumps [github.com/open-policy-agent/opa](https://github.com/open-policy-agent/opa) from 0.65.0 to 0.67.1.
- [Release notes](https://github.com/open-policy-agent/opa/releases)
- [Changelog](https://github.com/open-policy-agent/opa/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-policy-agent/opa/compare/v0.65.0...v0.67.1)

---
updated-dependencies:
- dependency-name: github.com/open-policy-agent/opa
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/open-policy-agent/opa/internal/gqlparser/validator/rules/fragments_on_composite_types.go

@@ -25,7 +25,7 @@ func init() {
 			)
 		})
 
-		observers.OnFragment(func(walker *Walker, fragment *ast.FragmentDefinition) {
+		observers.OnFragment(func(_ *Walker, fragment *ast.FragmentDefinition) {
 			if fragment.Definition == nil || fragment.TypeCondition == "" || fragment.Definition.IsCompositeType() {
 				return
 			}

vendor/github.com/open-policy-agent/opa/internal/gqlparser/validator/rules/known_argument_names.go

@@ -10,7 +10,7 @@ import (
 func init() {
 	AddRule("KnownArgumentNames", func(observers *Events, addError AddErrFunc) {
 		// A GraphQL field is only valid if all supplied arguments are defined by that field.
-		observers.OnField(func(walker *Walker, field *ast.Field) {
+		observers.OnField(func(_ *Walker, field *ast.Field) {
 			if field.Definition == nil || field.ObjectDefinition == nil {
 				return
 			}
@@ -33,7 +33,7 @@ func init() {
 			}
 		})
 
-		observers.OnDirective(func(walker *Walker, directive *ast.Directive) {
+		observers.OnDirective(func(_ *Walker, directive *ast.Directive) {
 			if directive.Definition == nil {
 				return
 			}

vendor/github.com/open-policy-agent/opa/internal/gqlparser/validator/rules/known_directives.go

@@ -15,7 +15,7 @@ func init() {
 			Column int
 		}
 		var seen = map[mayNotBeUsedDirective]bool{}
-		observers.OnDirective(func(walker *Walker, directive *ast.Directive) {
+		observers.OnDirective(func(_ *Walker, directive *ast.Directive) {
 			if directive.Definition == nil {
 				addError(
 					Message(`Unknown directive "@%s".`, directive.Name),

vendor/github.com/open-policy-agent/opa/internal/gqlparser/validator/rules/known_fragment_names.go

@@ -9,7 +9,7 @@ import (
 
 func init() {
 	AddRule("KnownFragmentNames", func(observers *Events, addError AddErrFunc) {
-		observers.OnFragmentSpread(func(walker *Walker, fragmentSpread *ast.FragmentSpread) {
+		observers.OnFragmentSpread(func(_ *Walker, fragmentSpread *ast.FragmentSpread) {
 			if fragmentSpread.Definition == nil {
 				addError(
 					Message(`Unknown fragment "%s".`, fragmentSpread.Name),

vendor/github.com/open-policy-agent/opa/internal/gqlparser/validator/rules/no_unused_fragments.go

@@ -13,13 +13,13 @@ func init() {
 		inFragmentDefinition := false
 		fragmentNameUsed := make(map[string]bool)
 
-		observers.OnFragmentSpread(func(walker *Walker, fragmentSpread *ast.FragmentSpread) {
+		observers.OnFragmentSpread(func(_ *Walker, fragmentSpread *ast.FragmentSpread) {
 			if !inFragmentDefinition {
 				fragmentNameUsed[fragmentSpread.Name] = true
 			}
 		})
 
-		observers.OnFragment(func(walker *Walker, fragment *ast.FragmentDefinition) {
+		observers.OnFragment(func(_ *Walker, fragment *ast.FragmentDefinition) {
 			inFragmentDefinition = true
 			if !fragmentNameUsed[fragment.Name] {
 				addError(

vendor/github.com/open-policy-agent/opa/internal/gqlparser/validator/rules/no_unused_variables.go

@@ -9,7 +9,7 @@ import (
 
 func init() {
 	AddRule("NoUnusedVariables", func(observers *Events, addError AddErrFunc) {
-		observers.OnOperation(func(walker *Walker, operation *ast.OperationDefinition) {
+		observers.OnOperation(func(_ *Walker, operation *ast.OperationDefinition) {
 			for _, varDef := range operation.VariableDefinitions {
 				if varDef.Used {
 					continue

vendor/github.com/open-policy-agent/opa/internal/gqlparser/validator/rules/provided_required_arguments.go

@@ -9,7 +9,7 @@ import (
 
 func init() {
 	AddRule("ProvidedRequiredArguments", func(observers *Events, addError AddErrFunc) {
-		observers.OnField(func(walker *Walker, field *ast.Field) {
+		observers.OnField(func(_ *Walker, field *ast.Field) {
 			if field.Definition == nil {
 				return
 			}
@@ -35,7 +35,7 @@ func init() {
 			}
 		})
 
-		observers.OnDirective(func(walker *Walker, directive *ast.Directive) {
+		observers.OnDirective(func(_ *Walker, directive *ast.Directive) {
 			if directive.Definition == nil {
 				return
 			}

vendor/github.com/open-policy-agent/opa/internal/gqlparser/validator/rules/unique_argument_names.go

@@ -9,11 +9,11 @@ import (
 
 func init() {
 	AddRule("UniqueArgumentNames", func(observers *Events, addError AddErrFunc) {
-		observers.OnField(func(walker *Walker, field *ast.Field) {
+		observers.OnField(func(_ *Walker, field *ast.Field) {
 			checkUniqueArgs(field.Arguments, addError)
 		})
 
-		observers.OnDirective(func(walker *Walker, directive *ast.Directive) {
+		observers.OnDirective(func(_ *Walker, directive *ast.Directive) {
 			checkUniqueArgs(directive.Arguments, addError)
 		})
 	})

vendor/github.com/open-policy-agent/opa/internal/gqlparser/validator/rules/unique_directives_per_location.go

@@ -9,7 +9,7 @@ import (
 
 func init() {
 	AddRule("UniqueDirectivesPerLocation", func(observers *Events, addError AddErrFunc) {
-		observers.OnDirectiveList(func(walker *Walker, directives []*ast.Directive) {
+		observers.OnDirectiveList(func(_ *Walker, directives []*ast.Directive) {
 			seen := map[string]bool{}
 
 			for _, dir := range directives {

vendor/github.com/open-policy-agent/opa/internal/gqlparser/validator/rules/unique_fragment_names.go

@@ -11,7 +11,7 @@ func init() {
 	AddRule("UniqueFragmentNames", func(observers *Events, addError AddErrFunc) {
 		seenFragments := map[string]bool{}
 
-		observers.OnFragment(func(walker *Walker, fragment *ast.FragmentDefinition) {
+		observers.OnFragment(func(_ *Walker, fragment *ast.FragmentDefinition) {
 			if seenFragments[fragment.Name] {
 				addError(
 					Message(`There can be only one fragment named "%s".`, fragment.Name),

vendor/github.com/open-policy-agent/opa/internal/gqlparser/validator/rules/unique_input_field_names.go

@@ -9,7 +9,7 @@ import (
 
 func init() {
 	AddRule("UniqueInputFieldNames", func(observers *Events, addError AddErrFunc) {
-		observers.OnValue(func(walker *Walker, value *ast.Value) {
+		observers.OnValue(func(_ *Walker, value *ast.Value) {
 			if value.Kind != ast.ObjectValue {
 				return
 			}

vendor/github.com/open-policy-agent/opa/internal/gqlparser/validator/rules/unique_operation_names.go

@@ -11,7 +11,7 @@ func init() {
 	AddRule("UniqueOperationNames", func(observers *Events, addError AddErrFunc) {
 		seen := map[string]bool{}
 
-		observers.OnOperation(func(walker *Walker, operation *ast.OperationDefinition) {
+		observers.OnOperation(func(_ *Walker, operation *ast.OperationDefinition) {
 			if seen[operation.Name] {
 				addError(
 					Message(`There can be only one operation named "%s".`, operation.Name),

vendor/github.com/open-policy-agent/opa/internal/gqlparser/validator/rules/unique_variable_names.go

@@ -9,7 +9,7 @@ import (
 
 func init() {
 	AddRule("UniqueVariableNames", func(observers *Events, addError AddErrFunc) {
-		observers.OnOperation(func(walker *Walker, operation *ast.OperationDefinition) {
+		observers.OnOperation(func(_ *Walker, operation *ast.OperationDefinition) {
 			seen := map[string]int{}
 			for _, def := range operation.VariableDefinitions {
 				// add the same error only once per a variable.

vendor/github.com/open-policy-agent/opa/internal/gqlparser/validator/rules/values_of_correct_type.go

@@ -13,7 +13,7 @@ import (
 
 func init() {
 	AddRule("ValuesOfCorrectType", func(observers *Events, addError AddErrFunc) {
-		observers.OnValue(func(walker *Walker, value *ast.Value) {
+		observers.OnValue(func(_ *Walker, value *ast.Value) {
 			if value.Definition == nil || value.ExpectedType == nil {
 				return
 			}

vendor/github.com/open-policy-agent/opa/internal/gqlparser/validator/rules/variables_are_input_types.go

@@ -9,7 +9,7 @@ import (
 
 func init() {
 	AddRule("VariablesAreInputTypes", func(observers *Events, addError AddErrFunc) {
-		observers.OnOperation(func(walker *Walker, operation *ast.OperationDefinition) {
+		observers.OnOperation(func(_ *Walker, operation *ast.OperationDefinition) {
 			for _, def := range operation.VariableDefinitions {
 				if def.Definition == nil {
 					continue