Update structured-merge-diff to latest version

vendor/sigs.k8s.io/structured-merge-diff/fieldpath/fromvalue.go

@@ -104,7 +104,7 @@ func GuessBestListPathElement(index int, item value.Value) PathElement {
 		return PathElement{Index: &index}
 	}
 
-	var keys []value.Field
+	var keys value.FieldList
 	for _, name := range AssociativeListCandidateFieldNames {
 		f, ok := item.MapValue.Get(name)
 		if !ok {
@@ -117,7 +117,8 @@ func GuessBestListPathElement(index int, item value.Value) PathElement {
 		keys = append(keys, *f)
 	}
 	if len(keys) > 0 {
-		return PathElement{Key: &value.Map{Items: keys}}
+		keys.Sort()
+		return PathElement{Key: &keys}
 	}
 	return PathElement{Index: &index}
 }