Minor spelling tweak

Author: jmgasper

src/front/src/app/upsertproject/upsertproject.html

@@ -13,7 +13,7 @@ <h2>{{title}}</h2>
       <div class="col-lg-6 with-button" ng-show="editing">
         <button class="btn btn-sm btn-info" ng-click="addHooks()">
           <strong>
-            Add Webhooks
+            Add Webhook
           </strong>
         </button>
       </div>