build(deps): bump github.com/russellhaering/goxmldsig

Bumps [github.com/russellhaering/goxmldsig](https://github.com/russellhaering/goxmldsig) from 1.5.0 to 1.6.0.
- [Release notes](https://github.com/russellhaering/goxmldsig/releases)
- [Commits](https://github.com/russellhaering/goxmldsig/compare/v1.5.0...v1.6.0)

---
updated-dependencies:
- dependency-name: github.com/russellhaering/goxmldsig
  dependency-version: 1.6.0
  dependency-type: indirect
...

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

vendor/github.com/russellhaering/goxmldsig/canonicalize.go

@@ -1,6 +1,7 @@
 package dsig
 
 import (
+	"maps"
 	"sort"
 
 	"github.com/beevik/etree"
@@ -164,9 +165,7 @@ func canonicalPrep(el *etree.Element, strip bool, comments bool) *etree.Element
 
 func canonicalPrepInner(el *etree.Element, seenSoFar map[string]string, strip bool, comments bool) *etree.Element {
 	_seenSoFar := make(map[string]string)
-	for k, v := range seenSoFar {
-		_seenSoFar[k] = v
-	}
+	maps.Copy(_seenSoFar, seenSoFar)
 
 	ne := el.Copy()
 	sort.Sort(etreeutils.SortedAttrs(ne.Attr))

vendor/github.com/russellhaering/goxmldsig/etreeutils/namespace.go

@@ -3,6 +3,7 @@ package etreeutils
 import (
 	"errors"
 	"fmt"
+	"maps"
 	"sort"
 
 	"github.com/beevik/etree"
@@ -63,9 +64,7 @@ func (ctx NSContext) CheckLimit() error {
 
 func (ctx NSContext) Copy() NSContext {
 	prefixes := make(map[string]string, len(ctx.prefixes)+4)
-	for k, v := range ctx.prefixes {
-		prefixes[k] = v
-	}
+	maps.Copy(prefixes, ctx.prefixes)
 
 	return NSContext{prefixes: prefixes, limit: ctx.limit}
 }
@@ -127,9 +126,7 @@ func (ctx NSContext) SubContext(el *etree.Element) (NSContext, error) {
 // Prefixes returns a copy of this context's prefix map.
 func (ctx NSContext) Prefixes() map[string]string {
 	prefixes := make(map[string]string, len(ctx.prefixes))
-	for k, v := range ctx.prefixes {
-		prefixes[k] = v
-	}
+	maps.Copy(prefixes, ctx.prefixes)
 
 	return prefixes
 }

vendor/github.com/russellhaering/goxmldsig/etreeutils/unmarshal.go

@@ -9,7 +9,7 @@ import (
 // NSUnmarshalElement unmarshals the passed etree Element into the value pointed to by
 // v using encoding/xml in the context of the passed NSContext. If v implements
 // ElementKeeper, SetUnderlyingElement will be called on v with a reference to el.
-func NSUnmarshalElement(ctx NSContext, el *etree.Element, v interface{}) error {
+func NSUnmarshalElement(ctx NSContext, el *etree.Element, v any) error {
 	detatched, err := NSDetatch(ctx, el)
 	if err != nil {
 		return err

vendor/github.com/russellhaering/goxmldsig/validate.go

@@ -306,9 +306,10 @@ func (ctx *ValidationContext) validateSignature(el *etree.Element, sig *types.Si
 	var ref *types.Reference
 
 	// Find the first reference which references the top-level element
-	for _, _ref := range signedInfo.References {
-		if _ref.URI == "" || _ref.URI[1:] == idAttr {
-			ref = &_ref
+	for i := range signedInfo.References {
+		if signedInfo.References[i].URI == "" || signedInfo.References[i].URI[1:] == idAttr {
+			ref = &signedInfo.References[i]
+			break
 		}
 	}