Fixed broken contributing link

tylerdave · tylerdave · commit ad9f689f830f · 2015-05-03T22:11:32.000-04:00
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -4,7 +4,7 @@ How to contribute
 This guide is under heavy development. If you would like to contribute, please
 see:
 
-http://docs.python-guide.org/en/latest/notes/contribute.html
+http://docs.python-guide.org/en/latest/notes/contribute/
 
 
 Style Guide
