Fix link for incrementable.js file

index.html

@@ -374,7 +374,7 @@ <h2 id="new-submissions">Submission guidelines</h2>
 </script>
 <script src="http://lea.verou.me/csss/plugins/css-edit.js"></script>	
 <script src="http://lea.verou.me/csss/plugins/css-snippets.js"></script>
-<script src="https://raw.github.com/LeaVerou/Incrementable/master/incrementable.js"></script>
+<script src="https://raw.github.com/LeaVerou/incrementable/gh-pages/incrementable.js"></script>
 <script src="http://bytesizematters.com/bytesize.js"></script>
 <script src="css3patterns.js"></script>