Docs/admin-guide/mm/damon/usage: fixup missed :ref: keyword

Patch series "mm/damon: misc fixups for documents, comments and its
tracepoint".

This patchset contains miscellaneous simple fixups for documents, comments and
tracepoint of DAMON.


This patch (of 11):

A cross-link reference in DAMON usage document is missing ':ref:' Sphynx
keyword.  Fix it.

Link: https://lkml.kernel.org/r/20230907022929.91361-1-sj@kernel.org
Link: https://lkml.kernel.org/r/20230907022929.91361-2-sj@kernel.orgSigned-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Documentation/admin-guide/mm/damon/usage.rst

@@ -392,7 +392,7 @@ pages of all memory cgroups except ``/having_care_already``.::
     echo N > 1/matching
 
 Note that ``anon`` and ``memcg`` filters are currently supported only when
-``paddr`` `implementation <sysfs_contexts>` is being used.
+``paddr`` :ref:`implementation <sysfs_contexts>` is being used.
 
 Also, memory regions that are filtered out by ``addr`` or ``target`` filters
 are not counted as the scheme has tried to those, while regions that filtered