fix: update data-fullscreen to fullscreen

Author: frankpagan

docs/index.html

@@ -108,7 +108,7 @@ <h2 class="padding:5px_0px">Demo</h2>
                                 modal-header="false" class="margin-right:10px">
     				  	    <i class="fas fa-external-link-alt"></i>
     				     </a>
-                            <a class="margin-right:5px" data-fullscreen target="#playground-1"><i class="fas fa-expand"></i></a>
+                            <a class="margin-right:5px" fullscreen target="#playground-1"><i class="fas fa-expand"></i></a>
                         </div>
 
                         <div class="svRow">