fix: update data-fullscreen to fullscreen

Author: frankpagan

docs/index.html

@@ -118,7 +118,7 @@ <h2 class="padding:5px_0px">Demo</h2>
         				  	     class="margin-right:10px">
         				  	    <i class="fas fa-external-link-alt"></i>
         				     </a>        
-        				     <a class="margin-right:5px" data-fullscreen data-fullscreen target="#sandbox"><i class="fas fa-expand"></i></a>
+        				     <a class="margin-right:5px" fullscreen fullscreen target="#sandbox"><i class="fas fa-expand"></i></a>
         			        </div>
 
         			        <div class="svRow">