MAINTAINERS: update ocfs2-devel mailing list address

The ocfs2-devel mailing list has been migrated to the kernel.org
infrastructure, update the related entry to reflect the change.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Anthony Iliopoulos <[e-mail]>
Acked-by: Joseph Qi <[e-mail]>
Acked-by: Joel Becker <[e-mail]>
Cc: Mark Fasheh <[e-mail]>
Cc: Junxiao Bi <[e-mail]>
Cc: Changwei Ge <[e-mail]>
Cc: Gang He <[e-mail]>
Cc: Jun Piao <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

MAINTAINERS

···
 M:	Mark Fasheh <[e-mail]>
 M:	Joel Becker <[e-mail]>
 M:	Joseph Qi <[e-mail]>
-L:	[e-mail] (moderated for non-subscribers)
+L:	[e-mail]
 S:	Supported
 W:	http://ocfs2.wiki.kernel.org
 F:	Documentation/filesystems/dlmfs.rst