minor symfony#9294 Use the proper path of version 2.x (Romain)

This PR was submitted for the 2.8 branch but it was merged into the 2.7 branch instead (closes symfony#9294).

Discussion
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Use the proper path of version 2.x

This doc used the path added as of version 3.x.
In version 2.x, it has to be app/foo for the commands.

Commits
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9f4cdf7 Use the proper path of version 2.x

Author: javiereguiluz

reference/configuration/framework.rst

@@ -11,10 +11,10 @@ configured under the ``framework`` key in your application configuration.
 .. code-block:: terminal
 
     # displays the default config values defined by Symfony
-    $ php bin/console config:dump framework
+    $ php app/console config:dump framework
 
     # displays the actual config values used by your application
-    $ php bin/console debug:config framework
+    $ php app/console debug:config framework
 
 .. note::