doc/releases: move Dashboard items from CephFS

Move three dashboard-related items from beneath a heading reading
"CephFS" and put them beneath a heading reading "Dashboard".

Fixes: ceph#59539 (comment)

Signed-off-by: Zac Dover <[email protected]>

Author: zdover23

doc/releases/squid.rst

@@ -27,9 +27,6 @@ RADOS
 Dashboard
 
 * Improved navigation layout
-
-CephFS
-
 * Support for managing CephFS snapshots and clones, as well as snapshot schedule management
 * Manage authorization capabilities for CephFS resources
 * Helpers on mounting a CephFS volume