adds key to list to render item when order is changed

src/components/archiveList.vue

@@ -61,6 +61,7 @@ This file is part of ArciveList.
             </div>
           </li>
           <li v-for="site in sites"
+              :key="site.id"
               class="accordion-item"
               data-accordion-item>
             <div class="accordion-title"