mentioning areyouok as a linkchecker alternative

[Bhupesh-V]

Hey, any chance we could mention AreYouOk https://github.com/Bhupesh-V/areyouok as a link health checker?

Here is a demo, where AreYouOk uses issues to communicate dead links https://github.com/Bhupesh-V/til/issues/27 thanks to create-issue-from-file ❤️