All sites header: Update San Diego link to not use relative path

Author: ajpiano

themes/jquery/header.php

@@ -84,7 +84,7 @@
 							<li><a href="http://modernweb.com/training/jquery-oct-2013.php">Oct 15-17 | jQuery Virtual Training</a></li>
 							<li><a href="http://2013.cssdevconf.com/">Oct 21-22 | CSS Dev Conf</a></li>
 							<li><a href="http://javascriptsummit.com/">Nov 19-21 | JavaScript Summit</a></li>
-							<li><a href="/2014/san-diego/">Feb 12-13 | jQuery San Diego</a></li>
+							<li><a href="http://events.jquery.org/2014/san-diego/">Feb 12-13 | jQuery San Diego</a></li>
 							<li><a href="http://www.gentics.com/jquery-europe">Feb 28-Mar 1 | jQuery Europe</a></li>
 							<li><a href="http://jqueryuk.com">May 16 | jQuery UK</a></li>
 						</ul>