Update Default.cshtml

fix area missing in the bottom of dropdown botton

samples/MusicStore/Views/Shared/Components/GenreMenu/Default.cshtml

@@ -11,7 +11,7 @@
         }
         <li class="divider"></li>
         <li>
-            <a asp-controller="Store" asp-action="Index">More...</a>
+            <a asp-area="" asp-controller="Store" asp-action="Index">More...</a>
         </li>
     </ul>
-</li>
+</li>