Update the oauth helper link in the readme
Update the oauth helper link in the readme

The previous link was to a repository that no longer exists.

YaManicKill/flairhq,robertdyjas/flairhq,Kirzi/flairhq,robertdyjas/flairhq,pokemontrades/flairhq,pokemontrades/flairhq,Kirzi/flairhq,YaManicKill/flairhq