I have a few (~5) applications where the version in the debian stable repos is to old for me. Examples would be podman and restic. I found out that the version for testing are recent enough. Is it possible to install specific apps from testing while the default is stable?
I removed all comments for simplicity.
deb http://deb.debian.org/debian/ bookworm main non-free-firmware contrib non-free deb-src http://deb.debian.org/debian/ bookworm main non-free-firmware contrib non-free deb http://security.debian.org/debian-security bookworm-security main non-free-firmware contrib non-free deb-src http://security.debian.org/debian-security bookworm-security main non-free-firmware contrib non-free deb http://deb.debian.org/debian/ bookworm-updates main non-free-firmware contrib non-free deb-src http://deb.debian.org/debian/ bookworm-updates main non-free-firmware contrib non-free
Here is the official upgrade documentation
TL;DR
Pay attention to your full-upgrade. Good luck.
Thanks!