feat: Add removal of OC.SystemTags JS API

Signed-off-by: Carl Schwan <[email protected]>

Author: CarlSchwan

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>`_.
+- The ``OC.SystemTags`` api was removed. If you need to get the list of system tags, checkout `this merge request <https://github.com/nextcloud/files_retention/pull/855>`_.
 
 Back-end changes
 ----------------