MAINTAINERS: update cifs location

Commit 30706a545417 ("cifs: create a new Documentation/ directory and
move docfiles into it") moved the files, update the pattern.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 file changed