MAINTAINERS: update the dm-devel mailing list

dm-devel@redhat.com has migrated to dm-devel@lists.linux.dev

Signed-off-by: Mike Snitzer <snitzer@kernel.org>

Author: Mike Snitzer

MAINTAINERS

@@ -5985,8 +5985,8 @@ F:	include/linux/devm-helpers.h
 DEVICE-MAPPER  (LVM)
 M:	Alasdair Kergon <agk@redhat.com>
 M:	Mike Snitzer <snitzer@kernel.org>
-M:	dm-devel@redhat.com
-L:	dm-devel@redhat.com
+M:	dm-devel@lists.linux.dev
+L:	dm-devel@lists.linux.dev
 S:	Maintained
 W:	http://sources.redhat.com/dm
 Q:	http://patchwork.kernel.org/project/dm-devel/list/