chore: OC.AppConfig was removed in favor of OCP.AppConfig

Signed-off-by: Ferdinand Thiessen <[email protected]>

Author: susnux

developer_manual/app_publishing_maintenance/app_upgrade_guide/upgrade_to_33.rst

@@ -25,6 +25,7 @@ Removed APIs
 
 - The global ``md5`` implementation is removed. It was deprecated since Nextcloud 20 and not used by Nextcloud anymore.
   If you still need a ``md5`` implementation you can just use some external package like `crypto-browserify <https://www.npmjs.com/package/crypto-browserify>`_.
+- ``OC.AppConfig`` was deprecated since Nextcloud 16 and was now removed. Instead use ``OCP.AppConfig``.
 - The ``OC.SystemTags`` api was removed. If you need to get the list of system tags, check `this merge request <https://github.com/nextcloud/files_retention/pull/855>`_ for how to fetch the tags directly.
 - ``OC.set`` and ``OC.get`` were removed. Both are deprecated since Nextcloud 19.
   For ``get``, if really needed, use `lodash get <https://lodash.com/docs#get>`_.