better icon

www/index.html

@@ -59,7 +59,7 @@
           <i class="fas fa-signal"></i>
         </button>
         <button type="button" class="autodoc_ajax_on d-none btn btn-primary disabled">
-          <i class="fas fa-spinner"></i>
+          <i class="fas fa-sync"></i>
         </button>
       </div>
     </div>