chore(deps): update python docker tag to v3.9.23

Author: renovate[bot]

renovate.Dockerfile

@@ -10,7 +10,7 @@ FROM scratch
 
 # EOL 2025-10
 # renovate: datasource=docker depName=python versioning=docker
-ENV PYTHON_VERSION=3.9.22
+ENV PYTHON_VERSION=3.9.23
 
 # EOL 2026-10
 # renovate: datasource=docker depName=python versioning=docker