Docs/mm/damon/maintainer-profile: change the maintainer's timezone from PST to PT

The document says the maintainer is working on only PST.  The maintainer
respects daylight saving system, though.  Update the time zone to PT.

Link: https://lkml.kernel.org/r/20240503180318.72798-10-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>