Updated change log.

laravel/documentation/changes.md

@@ -70,6 +70,7 @@
 - Added Input::json() method for working with applications using Backbone.js or similar.
 - Added Response::json method for creating JSON responses.
 - Added Response::eloquent method for creating Eloquent responses.
+- Fixed bug when using many-to-many relationships on non-default database connection.
 
 <a name="upgrade-3.2"></a>
 ## Upgrading From 3.1