Switched thumbnails from divs to list items

src/components/Gallery.vue

@@ -8,15 +8,15 @@
         </figcaption>
       </figure>
     </div>
-    <div class="thumbnails">
-      <div class="thumbnail" v-for="(img, index) in images" :key="index">
+    <ul class="thumbnails">
+      <li class="thumbnail" v-for="(img, index) in images" :key="index">
         <img
           :src="img"
           :alt="'Image' + index"
           @click.prevent="setBigImage(index)"
         />
-      </div>
-    </div>
+      </li>
+    </ul>
   </div>
 </template>