Fix GH repo link

Fixes #40

Author: wickr

index.md

@@ -7,4 +7,4 @@ layout: home
 
 Code4Lib.org was migrated from Drupal to Jekyll in June 2018. Some
 links may still be broken. To report issues or help fix see:
-<a href="https://github.com/code4lib/code4lib.org">https://github.com/code4lib/code4lib.org</a>
+<a href="https://github.com/code4lib/code4lib.github.io">https://github.com/code4lib/code4lib.github.io</a>