Там это в debian репу модернизируют. Решил обновиться
# apt update
Hit:1 http://deb.debian.org/debian sid InRelease
91 packages can be upgraded. Run 'apt list --upgradable' to see them.
Notice: Some sources can be modernized. Run 'apt modernize-sources' to do so.
# apt modernize-sources
The following files need modernizing:
- /etc/apt/sources.list
Modernizing will replace .list files with the new .sources format,
add Signed-By values where they can be determined automatically,
and save the old files into .list.bak files.
This command supports the 'signed-by' and 'trusted' options. If you
have specified other options inside [] brackets, please transfer them
manually to the output files; see sources.list(5) for a mapping.
For a simulation, respond N in the following prompt.
Rewrite 1 sources? [Y/n] y
Modernizing /etc/apt/sources.list...
- Writing /etc/apt/sources.list.d/debian.sources
и теперь оно вот так выглядит
# Modernized from /etc/apt/sources.list
Types: deb
URIs: http://deb.debian.org/debian/
Suites: sid
Components: main non-free non-free-firmware contrib
Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg
а раньше вот такое было
deb http://deb.debian.org/debian/ sid main non-free non-free-firmware contrib
очевидно скоро в финал и поделия такое завезут.
