Bump python from 3.12.0rc1 to 3.12.0rc3

Bumps python from 3.12.0rc1 to 3.12.0rc3.

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

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

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.12.0rc1
+FROM python:3.12.0rc3
 
 RUN apt-get update \
   && apt-get install --yes --no-install-recommends \