fix: v-for explicit key

Signed-off-by: Adam Setch <[email protected]>

src/views/administration/AdminMenu.vue

@@ -24,7 +24,7 @@
       >
         <div class="list-group" id="list-tab" role="tablist">
           <router-link
-            :ref="item.id"
+            :key="item.id"
             v-for="item in section.children"
             class="list-group-item list-group-item-action"
             data-toggle="list"