docs/ja_JP/SubmittingPatches: Update GregKH links

docs/ja_JP/SubmittingPatches: Update GregKH links

Reflect changes made in commit f5039935ac68 ("Documentation: update
GregKH links").

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/20220503104613.49001-1-akiyks@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>