PendingReleaseNotes: support for subvolumes and subvolume groups in snap_schedule

Signed-off-by: Milind Changire <[email protected]>

Author: mchangir

PendingReleaseNotes

@@ -103,6 +103,8 @@ CephFS: Disallow delegating preallocated inode ranges to clients. Config
   module is now available. Users may run `ceph balancer status detail` to see more
   details about which PGs were updated in the balancer's last optimization.
   See https://docs.ceph.com/en/latest/rados/operations/balancer/ for more information.
+* CephFS: Full support for subvolumes and subvolume groups is now available
+  for snap_schedule Manager module.
 
 >=18.0.0