chore(deps): bump python in /platformsh

Bumps python from 3.12.7-slim-bullseye to 3.13.0-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>

platformsh/Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.12.7-slim-bullseye as base
+FROM python:3.13.0-slim-bullseye as base
 LABEL maintainer="opensource@ekino.com"
 
 ARG PLATFORM_VERSION