build(deps): bump library/python in /docker/unstable (#2922)

Bumps library/python from 3.12.6-slim to 3.12.7-slim.

---
updated-dependencies:
- dependency-name: library/python
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docker/unstable/Dockerfile

@@ -1,4 +1,4 @@
-FROM docker.io/library/python:3.12.6-slim@sha256:ad48727987b259854d52241fac3bc633574364867b8e20aec305e6e7f4028b26
+FROM docker.io/library/python:3.12.7-slim@sha256:af4e85f1cac90dd3771e47292ea7c8a9830abfabbe4faa5c53f158854c2e819d
 
 # This file is generated from docker:unstable in Taskfile.yml
 COPY var/requirements.txt /var/tmp/build/