docs/ja_JP/SubmittingPatches: Suggest the use of scripts/get_maintainer.pl

docs/ja_JP/SubmittingPatches: Suggest the use of scripts/get_maintainer.pl

Reflect changes made in commit e52d2e1f25f0
("Documentation/SubmittingPatches: suggested the use of
scripts/get_maintainer.pl").

Signed-off-by: Akira Yokosawa <akiyks@gmail.com>
Cc: Tsugikazu Shibata <shibata@linuxfoundation.org>
Cc: Kosuke Fujimoto <fujimotokosuke0@gmail.com>
Cc: linux-doc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Acked-by: Tsugikazu Shibata <shibata@linuxfoundation.org>
Reviewed-by: Kosuke Fujimoto <fujimotokosuke0@gmail.com>
Link: https://lore.kernel.org/r/20220503104650.49068-1-akiyks@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>