[LyX/master] Update ja manuals from Koji

[Pavel Sanda]

commit 723d3703fd504534ed6325f28528578e54114335
Author: Pavel Sanda <sanda at lyx.org>
Date:   Fri Feb 24 19:57:30 2023 +0100

    Update ja manuals from Koji

 lib/doc/ja/Additional.lyx    | 4001 ++++++++++++++++--------------------------
 lib/doc/ja/Customization.lyx |  175 ++-
 lib/doc/ja/LaTeXConfig.lyx   |  210 +++-
 lib/doc/ja/UserGuide.lyx     |  531 ++++++-
 4 files changed, 2349 insertions(+), 2568 deletions(-)