Update vendor

vendor/google.golang.org/protobuf/internal/encoding/messageset/messageset.go

@@ -10,11 +10,10 @@ import (
 
 	"google.golang.org/protobuf/encoding/protowire"
 	"google.golang.org/protobuf/internal/errors"
-	pref "google.golang.org/protobuf/reflect/protoreflect"
-	preg "google.golang.org/protobuf/reflect/protoregistry"
+	"google.golang.org/protobuf/reflect/protoreflect"
 )
 
-// The MessageSet wire format is equivalent to a message defiend as follows,
+// The MessageSet wire format is equivalent to a message defined as follows,
 // where each Item defines an extension field with a field number of 'type_id'
 // and content of 'message'. MessageSet extensions must be non-repeated message
 // fields.
@@ -34,6 +33,7 @@ const (
 // ExtensionName is the field name for extensions of MessageSet.
 //
 // A valid MessageSet extension must be of the form:
+//
 //	message MyMessage {
 //		extend proto2.bridge.MessageSet {
 //			optional MyMessage message_set_extension = 1234;
@@ -43,38 +43,22 @@ const (
 const ExtensionName = "message_set_extension"
 
 // IsMessageSet returns whether the message uses the MessageSet wire format.
-func IsMessageSet(md pref.MessageDescriptor) bool {
+func IsMessageSet(md protoreflect.MessageDescriptor) bool {
 	xmd, ok := md.(interface{ IsMessageSet() bool })
 	return ok && xmd.IsMessageSet()
 }
 
-// IsMessageSetExtension reports this field extends a MessageSet.
-func IsMessageSetExtension(fd pref.FieldDescriptor) bool {
-	if fd.Name() != ExtensionName {
+// IsMessageSetExtension reports this field properly extends a MessageSet.
+func IsMessageSetExtension(fd protoreflect.FieldDescriptor) bool {
+	switch {
+	case fd.Name() != ExtensionName:
+		return false
+	case !IsMessageSet(fd.ContainingMessage()):
+		return false
+	case fd.FullName().Parent() != fd.Message().FullName():
 		return false
 	}
-	if fd.FullName().Parent() != fd.Message().FullName() {
-		return false
-	}
-	return IsMessageSet(fd.ContainingMessage())
-}
-
-// FindMessageSetExtension locates a MessageSet extension field by name.
-// In text and JSON formats, the extension name used is the message itself.
-// The extension field name is derived by appending ExtensionName.
-func FindMessageSetExtension(r preg.ExtensionTypeResolver, s pref.FullName) (pref.ExtensionType, error) {
-	name := s.Append(ExtensionName)
-	xt, err := r.FindExtensionByName(name)
-	if err != nil {
-		if err == preg.NotFound {
-			return nil, err
-		}
-		return nil, errors.Wrap(err, "%q", name)
-	}
-	if !IsMessageSetExtension(xt.TypeDescriptor()) {
-		return nil, preg.NotFound
-	}
-	return xt, nil
+	return true
 }
 
 // SizeField returns the size of a MessageSet item field containing an extension