jQuery: Link to the learning center in `readme.md`

There was a link to one article instead of the whole site. Kinda sad as the whole site is awesome :)

examples/jquery/readme.md

@@ -11,7 +11,7 @@ The [jQuery website](http://jquery.com) is a great resource for getting started.
 
 Here are some links you may find helpful:
 
-* [How jQuery Works](http://learn.jquery.com/about-jquery/how-jquery-works)
+* [Learning Center](http://learn.jquery.com/)
 * [API Reference](http://api.jquery.com)
 * [Plugins](http://plugins.jquery.com)
 * [Browser Support](http://jquery.com/browser-support)