[#7399] move versionadded directive after code block

Author: xabbuh

service_container/debug.rst

@@ -35,9 +35,9 @@ its id:
 By default, the arguments of the services are not included in the output. Add the
 ``--show-arguments`` option to show them:
 
-.. versionadded:: 3.3
-   The ``--show-arguments`` option was introduced in Symfony 3.3.
-
 .. code-block:: terminal
 
     $ php bin/console debug:container app.mailer --show-arguments
+
+.. versionadded:: 3.3
+   The ``--show-arguments`` option was introduced in Symfony 3.3.