update the advent calendar

* change the URL to point to the page that lists all days
* Add the year in the link in preparation for the 2010 advent season

source/documentation/index.html

@@ -24,7 +24,7 @@ <h3>For newcomers</h3>
 	    <li><a href="http://github.com/perl6/book">Using Perl&nbsp;6 (Onyx Neon Press book)</a>
             (in progress - <a href="http://github.com/downloads/perl6/book/2010.08.a4.pdf">2010-08 snapshot</a>)</li>
             <li><a href="http://szabgab.com/perl6.html#screencast">Perl&nbsp;6 screencasts</a></li>
-	    <li><a href="http://perl6advent.wordpress.com/">Perl&nbsp;6 Advent Calendar</a></li>
+	    <li><a href="http://perl6advent.wordpress.com/2009/12/01/perl-6-advent-calendar/">Perl&nbsp;6 Advent 2009 Calendar</a></li>
 	    <li><a href="http://en.wikibooks.org/wiki/Perl_6_Programming">"Perl&nbsp;6 Programming"</a> on Wikibooks</li>
 	    <li><a href="http://github.com/perlpilot/perl6-docs">Perl&nbsp;6 tutorials</a></li>
 	</ul>