build(deps): bump python

Bumps python from 3.9.6-slim-bullseye to 3.12.0-slim-bullseye.

---
updated-dependencies:
- dependency-name: python
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Dockerfile

@@ -1,6 +1,6 @@
 # artifacts: false
 # platforms: linux/386,linux/amd64
-FROM python:3.9.6-slim-bullseye as retroarcher-base
+FROM python:3.12.0-slim-bullseye as retroarcher-base
 
 FROM retroarcher-base as retroarcher-build