doc: added a note for damaged hard links in scrub documentation

Fixes: https://tracker.ceph.com/issues/69345
Signed-off-by: Md Mahamudur Rahaman Sajib <[email protected]>

Author: sajibreadd

doc/cephfs/scrub.rst

@@ -150,6 +150,8 @@ These above named MDS damages can be repaired by using the following command::
 If scrub is able to repair the damage, the corresponding entry is automatically
 removed from the damage table.
 
+Note: A scrub invoked with the ``repair`` option can identify an damaged hard link but not repair it.
+
 
 Evaluate strays using recursive scrub
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