Bot comment links 404

[BenjaminBrienen]

https://github.com/tikv/jemallocator/blob/master/CONTRIBUTING.md

[dpaoliello]

+1 saw this as well, looks like the bot is still linking the master branch but this repo now uses main as the default.

[dpaoliello]

And there is no CONTRIBUTING.md file at all...

[BusyJay]

Sorry, I think it should reference to https://github.com/tikv/tikv/blob/master/CONTRIBUTING.md instead.