docs/ja_JP/SubmittingPatches: Request summaries for commit references

Reflect changes made in commit 0af52703
("Documentation/SubmittingPatches: Request summaries for commit
references").

Note: Translated paragraph uses a slightly different structure and
omit a redundant phrase so that they are easier to follow.

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/20220503104820.49269-1-akiyks@gmail.com


Signed-off-by: Jonathan Corbet <corbet@lwn.net>