Add interface{} to any replacement to make fmt, exclude *.pb.go (#30461)

Since https://github.com/go-gitea/gitea/pull/25686, a few `interface{}`
have sneaked into the codebase. Add this replacement to `make fmt` to
prevent this from happening again.

Ideally a linter would do this, but I haven't found any suitable.

modules/optional/serialization.go

@@ -35,7 +35,7 @@ func (o *Option[T]) UnmarshalYAML(value *yaml.Node) error {
 	return nil
 }
 
-func (o Option[T]) MarshalYAML() (interface{}, error) {
+func (o Option[T]) MarshalYAML() (any, error) {
 	if !o.Has() {
 		return nil, nil
 	}