Bodge fix for help link on homepage.

Author: ntoll

index.html

@@ -9,7 +9,7 @@ <h1>Code With Mu</h1>
   programmers. It's written in Python and works on Windows, OSX, Linux
   and Raspberry Pi.</p>
   <p><a class="btn btn-lg btn-success" href="#download"
-      role="button">Download now</a> <a class="btn btn-primary" role="button" href="help">Help</a></p>
+      role="button">Download now</a> <a class="btn btn-primary" role="button" href="/help/0.9.13">Help</a></p>
 </div>
 
 <div class="row marketing">