Readme: fixed pledgie image url

Author: staabm

pages/index.html

@@ -62,4 +62,4 @@ <h3>Support</h3>
 </ul>
 
 <h3>Donate</h3>
-<a href="https://www.pledgie.com/campaigns/18159"><img style="border: none;" alt="Click here to lend your support to: jQuery Validation Plugin and make a donation at www.pledgie.com !" src="https://www.pledgie.com/campaigns/18159.png?skin_name=chrome" border="0" /></a>
+<a href="https://www.pledgie.com/campaigns/18159"><img style="border: none;" alt="Click here to lend your support to: jQuery Validation Plugin and make a donation at www.pledgie.com !" src="https://pledgie.com/campaigns/18159.png" border="0" /></a>