PM: hibernate: Fix typo in memory bitmaps description comment

Correct 'leave' to 'leaf' in memory bitmaps description comment.

Signed-off-by: Li Jun <lijun01@kylinos.cn>
Link: https://patch.msgid.link/20250819104038.1596952-1-lijun01@kylinos.cn


[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>