chore: re-route contribution reference in README.

Author: i0bs

README.rst

@@ -101,7 +101,7 @@ I think I'm all ready!
 Feel free to begin making `Pull Requests`_ and `Issues`_ on our GitHub!
 
 .. _quickstart guide: https://discord-interactions.rtfd.io/en/latest/quickstart.html
-.. _contribution requirements: https://github.com/goverfl0w/discord-interactions/blob/stable/CONTRIBUTING.md
+.. _contribution requirements: https://github.com/goverfl0w/discord-interactions/blob/stable/CONTRIBUTING.rst
 .. _MIT License: https://github.com/goverfl0w/discord-interactions/blob/stable/LICENSE
 .. _Pull Requests: https://github.com/goverfl0w/discord-interactions/pulls
 .. _Issues: https://github.com/goverfl0w/discord-interactions/issues