Update index.html

Author: kimjhpc

index.html

@@ -71,7 +71,7 @@ <h1 class="display-4">Good evening</h1>
     <i class="fas fa-external-link-alt"></i>
     <strong class="mr-auto">Bootstrap</strong>
     <small class="text-muted">just now</small>
-    <button type="button" class="close" data-dismiss="toast">
+    <button type="button" class="close" data-dismiss="toast" aria-label="Close">
       <span aria-hidden="true">&times;</span>
     </button>
   </div>