Your sources.list looks normal. You only lack non-free-firmware because I bet you upgraded from bullseye to bookworm.
"...The recommended locations for keyrings are /usr/share/keyrings for keyrings managed by packages, and /etc/apt/keyrings for keyrings managed by the system operator. If no keyring files are specified the default is the trusted.gpg keyring and all keyrings in the trusted.gpg.d/ directory..."
Source
I don't know what exactly "system operator" means in this context but in practice third-party repos (Mozilla Firefox, winehq etc) place their keyrings in /etc/apt/keyrings and use the option "Signed-By".
In a freshly installed (not upgraded from Bullseye) Bookwork system content of /etc/apt/trusted.gpg.d looks exactly the same with yours.
"...The recommended locations for keyrings are /usr/share/keyrings for keyrings managed by packages, and /etc/apt/keyrings for keyrings managed by the system operator. If no keyring files are specified the default is the trusted.gpg keyring and all keyrings in the trusted.gpg.d/ directory..."
Source
I don't know what exactly "system operator" means in this context but in practice third-party repos (Mozilla Firefox, winehq etc) place their keyrings in /etc/apt/keyrings and use the option "Signed-By".
In a freshly installed (not upgraded from Bullseye) Bookwork system content of /etc/apt/trusted.gpg.d looks exactly the same with yours.
Statistics: Posted by oZu — 2024-08-04 12:02