doc/cephfs: fix "OSD capabilities" link

Fix a broken link from the "OSD capabilites" reference on
doc/cephfs/client-auth.rst.

Fixes: https://tracker.ceph.com/issues/67218

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

Author: zdover23

doc/cephfs/client-auth.rst

@@ -30,9 +30,8 @@ access the underlying file data in RADOS directly. To segregate clients fully,
 isolate untrusted clients in their own RADOS namespace. You can place a
 client's filesystem subtree in a particular namespace using :ref:`file
 layouts<file-layouts>` and then restrict their RADOS access to that namespace
-using `OSD capabilities`_
+using :ref:`OSD capabilities<modify-user-capabilities>`.
 
-.. _OSD capabilities: ../rados/operations/user-management/#authorization-capabilities
 
 Syntax
 ------