Bump grpc to v1.50.1

Signed-off-by: Luca Comellini <luca.com@gmail.com>

vendor/google.golang.org/protobuf/reflect/protodesc/desc_resolve.go

@@ -155,9 +155,9 @@ func (r *resolver) findTarget(k protoreflect.Kind, scope protoreflect.FullName,
 //
 // Suppose the scope was "fizz.buzz" and the reference was "Foo.Bar",
 // then the following full names are searched:
-//	* fizz.buzz.Foo.Bar
-//	* fizz.Foo.Bar
-//	* Foo.Bar
+//   - fizz.buzz.Foo.Bar
+//   - fizz.Foo.Bar
+//   - Foo.Bar
 func (r *resolver) findDescriptor(scope protoreflect.FullName, ref partialName) (protoreflect.Descriptor, error) {
 	if !ref.IsValid() {
 		return nil, errors.New("invalid name reference: %q", ref)