Change Development Platform Link to Github

templates/layout.html

@@ -36,7 +36,7 @@
         <hr />
         <div class="text-center footer">
           <a href="%faq_url%">FAQ</a> · <a href="mailto:erzengel@lists.ccc.de"><span class="glyphicon glyphicon-envelope"></span> Contact</a> · <a href="mailto:bugs@engelsystem.de"><span class="glyphicon glyphicon-envelope"></span> Bugs / Features</a> · <a
-            href="https://vcs.wybt.net/engelsystem/trac/">Development Platform</a> · <a href="?p=credits">Credits</a>
+            href="https://github.com/engelsystem/engelsystem/">Development Platform</a> · <a href="?p=credits">Credits</a>
         </div>
       </div>
     </div>