For Debian 12 run the following:
Keep in mind that the owner of the key may distribute updates, packages and repositories that your system will trust (more information).
echo 'deb http://download.opensuse.org/repositories/systemsmanagement:/saltstack:/bundle:/next:/python311:/Debian12/Debian_12/ /' | sudo tee /etc/apt/sources.list.d/systemsmanagement:saltstack:bundle:next:python311:Debian12.list
curl -fsSL https://download.opensuse.org/repositories/systemsmanagement:saltstack:bundle:next:python311:Debian12/Debian_12/Release.key | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/systemsmanagement_saltstack_bundle_next_python311_Debian12.gpg > /dev/null
sudo apt update
sudo apt install venv-salt-minion