Docs/ABI/damon: document schemes dests directory

Document the new DAMOS action destinations sysfs directories on ABI doc.

Link: https://lkml.kernel.org/r/20250709005952.17776-6-bijan311@gmail.com


Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Bijan Tabatabai <bijantabatab@micron.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Ravi Shankar Jonnalagadda <ravis.opensrc@micron.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>