docs/mm/damon/design: fix typo: s/sz_trtied/sz_tried/

There are some typo in statistics section of DAMON design docs
- sz_trtied -> sz_tried

Link: https://lkml.kernel.org/r/20250729144414.31958-1-ekffu200098@gmail.com


Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com>
Signed-off-by: SeongJae Park <sj@kernel.org>
Reviewed-by: SeongJae Park <sj@kernel.org>
Reviewed-by: Dev Jain <dev.jain@arm.com>
Reviewed-by: Honggyu Kim <honggyu.kim@sk.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>