Updated a file location

Author: javiereguiluz

reference/configuration/framework.rst

@@ -925,14 +925,14 @@ Whether to enable the session support in the framework.
 
     .. code-block:: yaml
 
-        # app/config/config.yml
+        # config/packages/framework.yaml
         framework:
             session:
                 enabled: true
 
     .. code-block:: xml
 
-        <!-- app/config/config.xml -->
+        <!-- config/packages/framework.xml -->
         <?xml version="1.0" encoding="UTF-8" ?>
         <container xmlns="http://symfony.com/schema/dic/services"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
@@ -948,7 +948,7 @@ Whether to enable the session support in the framework.
 
     .. code-block:: php
 
-        // app/config/config.php
+        // config/packages/framework.php
         $container->loadFromExtension('framework', array(
             'session' => array(
                 'enabled' => true,