build(deps): bump github.com/open-policy-agent/opa from 1.8.0 to 1.9.0

Bumps [github.com/open-policy-agent/opa](https://github.com/open-policy-agent/opa) from 1.8.0 to 1.9.0.
- [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/v1.8.0...v1.9.0)

---
updated-dependencies:
- dependency-name: github.com/open-policy-agent/opa
  dependency-version: 1.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

vendor/github.com/spf13/pflag/flag.go

@@ -143,8 +143,9 @@ type ParseErrorsAllowlist struct {
 	UnknownFlags bool
 }
 
-// DEPRECATED: please use ParseErrorsAllowlist instead
-// This type will be removed in a future release
+// ParseErrorsWhitelist defines the parsing errors that can be ignored.
+//
+// Deprecated: use [ParseErrorsAllowlist] instead. This type will be removed in a future release.
 type ParseErrorsWhitelist = ParseErrorsAllowlist
 
 // NormalizedName is a flag name that has been normalized according to rules
@@ -165,8 +166,9 @@ type FlagSet struct {
 	// ParseErrorsAllowlist is used to configure an allowlist of errors
 	ParseErrorsAllowlist ParseErrorsAllowlist
 
-	// DEPRECATED: please use ParseErrorsAllowlist instead
-	// This field will be removed in a future release
+	// ParseErrorsAllowlist is used to configure an allowlist of errors.
+	//
+	// Deprecated: use [FlagSet.ParseErrorsAllowlist] instead. This field will be removed in a future release.
 	ParseErrorsWhitelist ParseErrorsAllowlist
 
 	name              string
@@ -1185,7 +1187,7 @@ func (f *FlagSet) Parse(arguments []string) error {
 		case ContinueOnError:
 			return err
 		case ExitOnError:
-			if errors.Is(err, ErrHelp) {
+			if err == ErrHelp {
 				os.Exit(0)
 			}
 			fmt.Fprintln(f.Output(), err)
@@ -1214,7 +1216,7 @@ func (f *FlagSet) ParseAll(arguments []string, fn func(flag *Flag, value string)
 		case ContinueOnError:
 			return err
 		case ExitOnError:
-			if errors.Is(err, ErrHelp) {
+			if err == ErrHelp {
 				os.Exit(0)
 			}
 			fmt.Fprintln(f.Output(), err)