install guide: Some translated messeges (po/ja/using-d-i.po) not shown in html

[Hideki Yamane <henrich@iijmio-mail.jp>]

Hi,

 I've translated ja.po for install guide but not shown in generated html.
 https://www.debian.org/releases/bullseye/amd64/ch06s04.ja.html#completing-installed-system

 I cannot find any errors for .po with msgfmt tool, can someone help me,
 please?


-- 
Hideki Yamane <henrich@iijmio-mail.jp>