Update link

Author: rozza

_includes/themes/metromongo/frontpage.html

@@ -13,7 +13,7 @@ <h2><span>mongo</span>engine</h2>
               <p>It uses a simple declarative API, similar to the Django ORM.</p>
               <p>
               Documentation available at
-              <a href="http://bit.ly/mongoengine-docs">http://bit.ly/mongoengine-docs</a>
+              <a href="http://docs.mongoengine.org">docs.mongoengine.org</a>
               - there is currently a <a href="http://docs.mongoengine.org/en/latest/tutorial.html">tutorial</a>, a <a href="http://docs.mongoengine.org/en/latest/guide/">user guide</a> and
               <a href="http://docs.mongoengine.org/en/latest/apireference.html">API reference</a>.
             </p>