docs(README): update dropzone example

Author: thgreasi

README.md

@@ -205,7 +205,7 @@ For more details about the events check the [jQueryUI API documentation](http://
   - [Promised Reverting](http://codepen.io/thgreasi/pen/MwQqdg)
 - [Locked Items](http://codepen.io/thgreasi/pen/GgdeEO)
 - [Draggable Handle](http://codepen.io/thgreasi/pen/ihAyr)
-- [Drop Zone](http://codepen.io/anon/pen/JorbqZ)
+- [Drop Zone](http://codepen.io/thgreasi/pen/LVXWeO)
 - [Draggable-Sortable like interaction](http://codepen.io/thgreasi/pen/LVVJgK)
 
 ## Integrations