Bug 1186936 - Add WhatsDeployed to the Help footer

ui/help.html

@@ -601,7 +601,7 @@
   </div>
   <div class="col-xs-6">
     <a class="midgray pull-right"
-       href="../media/revision">Build</a>
+       href="https://whatsdeployed.paas.allizom.org/?owner=mozilla&repo=treeherder&name[]=Stage&url[]=https://treeherder.allizom.org/media/revision&name[]=Prod&url[]=https://treeherder.mozilla.org/media/revision">What's Deployed?</a>
   </div>
 </div>