fix(demo): use md-dialog-actions

Author: ThomasBurleson

src/components/autocomplete/demoInsideDialog/dialog.tmpl.html

@@ -31,7 +31,8 @@ <h2>Autocomplete Dialog Example</h2>
     </div>
   </md-dialog-content>
 
-  <div class="md-actions">
+  <md-dialog-actions>
     <md-button aria-label="Finished" ng-click="ctrl.finish($event)">Finished</md-button>
-  </div>
-</md-dialog>
+  </md-dialog-actions>
+
+</md-dialog>