Fix the path of the default config dir

Author: javiereguiluz

bundles/best_practices.rst

@@ -166,8 +166,8 @@ Doctrine Entities/Documents
 ---------------------------
 
 If the bundle includes Doctrine ORM entities and/or ODM documents, it's
-recommended to define their mapping using XML files stored in ``config/``.
-This allows to override that mapping using the
+recommended to define their mapping using XML files stored in
+``Resources/config/doctrine/``. This allows to override that mapping using the
 :doc:`standard Symfony mechanism to override bundle parts </bundles/override>`.
 This is not possible when using annotations/attributes to define the mapping.