Added a change that was made in another commit

Author: javiereguiluz

Resources/doc/groups.rst

@@ -113,7 +113,7 @@ c) CouchDB Group class implementation
     namespace MyProject\MyBundle\Document;
 
     use FOS\UserBundle\Document\Group as BaseGroup;
-    use Doctrine\ODM\CouchDB\Mapping as MongoDB;
+    use Doctrine\ODM\CouchDB\Mapping as CouchDB;
 
     /**
      * @CouchDB\Document