MAINTAINERS: update SeongJae's email address

This updates SeongJae's email address in MAINTAINERS file to his
preferred one.

Link: https://lkml.kernel.org/r/20210917123958.3819-3-sj@kernel.orgSigned-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: SeongJae Park <sjpark@amazon.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -5161,7 +5161,7 @@ F:	net/ax25/ax25_timer.c
 F:	net/ax25/sysctl_net_ax25.c
 
 DATA ACCESS MONITOR
-M:	SeongJae Park <sjpark@amazon.de>
+M:	SeongJae Park <sj@kernel.org>
 L:	linux-mm@kvack.org
 S:	Maintained
 F:	Documentation/admin-guide/mm/damon/