build(deps): bump library/python in /docker/unstable (#2347)

Bumps library/python from 3.11.2-slim to 3.11.3-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:3.11.2-slim@sha256:2f749ef90f54fd4b3c77cde78eec23ab5b8199d9ac84e4ced6ae523ef223ef7b
+FROM docker.io/library/python:3.11.3-slim@sha256:5a67c38a7c28ad09d08f4e153280023a2df77189b55af7804d7ceb96fee6a68f
 
 # This file is generated from docker:unstable in Taskfile.yml
 COPY var/requirements.txt /var/tmp/build/