Any shell script to update to the deb822 .sources format?

Is there some shell script out there that will update my files for me?

# apt update
Notice: Missing Signed-By in the sources.list(5) entry for 'https://storage.googleapis.com/cros-packages/133 '
Notice: Missing Signed-By in the sources.list(5) entry for 'http://opensource.nchc.org.tw/debian '
Notice: Consider migrating all sources.list(5) entries to the deb822 .sources format
Notice: The deb822 .sources format supports both embedded as well as external OpenPGP keys
Notice: See apt-secure(7) for best practices in configuring repository signing.

I have spent hours trying to figure out this out and just give up. My files just have "deb ..." lines in them. And here is

$ cd /usr/share/keyrings && ls
cros.gpg                                        debian-archive-bullseye-stable.gpg
debian-archive-bookworm-automatic.gpg           debian-archive-buster-automatic.gpg
debian-archive-bookworm-security-automatic.gpg  debian-archive-buster-security-automatic.gpg
debian-archive-bookworm-stable.gpg              debian-archive-buster-stable.gpg
debian-archive-bullseye-automatic.gpg           debian-archive-keyring.gpg
debian-archive-bullseye-security-automatic.gpg  debian-archive-removed-keys.gpg

Also I filed https://issues.chromium.org/issues/392237686 because shouldn't /etc/apt/sources.list.d/cros.list be the chrome team's responsibility to update, not mine?