Update cookbook/logging/monolog.rst

[tolry]

The use statement needs to be changed with current master. Also a hint to which config file needs to be edited would be nice.

[wouterj]

You should put this on the first line of the code:

.. configuration-block::

    .. code-block:: yaml

        // app/config/config.yml
        yml code

    .. code-block:: xml

        // app/config/config.xml
        xml code

    .. code-block:: php

        // app/config/config.php
        php code

[tolry]

Is this all right like this or should I add empty tabs for xml and php?

[weaverryan]

Hi Tobias!

Great fix! I've merged this in and also added just a couple of descriptors about the file locations. These file locations are a bit tricky, as we'd normally say app/config/config.yml, but really, it's more common to have logging configuration in app/config/config_dev.yml or app/config/config_prod.yml, and services are more commonly configured in a bundle configuration file. But, I think this is a bit better, and hopefully good enough.

Thanks!