Updated Nabble URL - old one was failing

Author: Clinton Gormley

community/forum/index.html

@@ -15,7 +15,7 @@
     Below is a nabble mirror of the forum. Nabble seems to not always post messages to the mailing list, so make sure to post directly through google groups.
 </p>
 
-<a id="nabblelink" href="http://n3.nabble.com/ElasticSearch-Users-f115913.html">ElasticSearch Users</a>
+<a id="nabblelink" href="http://elasticsearch-users.115913.n3.nabble.com/">ElasticSearch Users</a>
 <script src="http://n3.nabble.com/embed/f115913"></script>
 </div>