chore(deps): update python docker tag to v3.12.6

Author: renovate[bot]

docker-compose.yml

@@ -1,7 +1,7 @@
 version: "3.4"
 services:
   www:
-    image: python:3.11.4
+    image: python:3.12.6
     working_dir: /app
     command: >
       bash -c "source /.venv/bin/activate && pip install -r requirements.txt && python manage.py runserver 0.0.0.0:8080"