Add Fork on GitHub link to repo to sidebar

index.html

@@ -61,6 +61,9 @@
                 <li><a href="https://wiki.mozilla.org/QA/Execution/Web_Testing">Wiki</a></li>
                 <li><a href="https://oneanddone.mozilla.org/tasks/available/?search=&team=6">Contribute</a></li>
               </ul>
+              <ul class="nav nav-sidebar">
+                <li id="nav-fork"><a href="https://github.com/mozilla/mozwebqa-dashboard/">Fork on GitHub</a></li>
+              </ul>
             </div>
         </div>
     </div>