I've vendored Rust serde_yaml again

Here's the situation: My project was originally using `serde_yaml`, but it was deprecated. However, my users encountered a tricky bug: in `serde_yaml`, the string `on` wasn't being correctly serialized to 'on', but rather to `on`, which represents a boolean variable. Therefore, I initially vendored `serde_yaml`, fixed it, and submitted the fix to the upstream community. Recently, I noticed a project called `serde_yaml_ng`, but it hasn't had a new version in a year. My question is whether I should continue vendoring it or maintain a public one again. I'd like to hear everyone's opinions.