Merge pull request ceph#60642 from yuvalif/wip-yuval-68858

doc/rgw/notification: clarified the notification_v2 behavior upon upgrade

Author: anthonyeleven

doc/radosgw/notifications.rst

@@ -7,6 +7,10 @@ Bucket Notifications
 .. versionchanged:: Squid
    A new "v2" format for Topic and Notification metadata can be enabled with
    the :ref:`feature_notification_v2` zone feature.
+   Enabling this feature after an upgrade from an older version will trigger
+   migration of the existing Topic and Notification metadata. 
+   In a greenfield deployment, the new format will be used.
+   The new format allows for the data to be synced between zones in the zonegroup.
 
 .. contents::