fixed incorrect vendor in the url on demo page

Author: jrencz

demo/index.html

@@ -25,7 +25,7 @@ <h1>Tree filter</h1>
 
         <p class="lead">Node filter for Tree - the AngularJS Tree component with drag and drop support.</p>
 
-        <p><a class="btn btn-lg btn-success" href="https://github.com/jrencz/agnular-ui-tree-keyboard" role="button">
+        <p><a class="btn btn-lg btn-success" href="https://github.com/ee/agnular-ui-tree-keyboard" role="button">
             Code on GitHub</a></p>
     </div>