firewall_gui: fix foreign_network display

firewall_gui/static/partials/rule-list.html

@@ -35,7 +35,7 @@
       <a href="#/{{rule.target.type}}s/{{rule.target.id}}">{{rule.target.name}}</a>
     </td>
     <td>
-      <a href="#/vlangroups/{{rule.foreignNetwork.id}}">{{rule.foreignNetwork.name}}</a>
+      <a href="#/vlangroups/{{rule.foreign_network.id}}">{{rule.foreign_network.name}}</a>
     </td>
     <td>{{rule.owner.name}}</td>
     <td>{{rule.description}}</td>