Fix
* fix: docker build fails installing git (605)
git was installed from bullseye-backports, but base image is referencing latest python:3.10
since bookworm was recently released, this now points at bookworm and installing the backport of git is actually trying to downgrade, resulting in this error:
> E: Packages were downgraded and -y was used without --allow-downgrades.
> ERROR: failed to solve: process &34;/bin/sh -c echo \&34;deb http://deb.debian.org/debian bullseye-backports main\" >> /etc/apt/sources.list; apt-get update; apt-get install -y git/bullseye-backports&34; did not complete successfully: exit code: 100 ([`9e3eb97`](https://github.com/python-semantic-release/python-semantic-release/commit/9e3eb979783bc39ca564c2967c6c77eecba682e6))