chore(deps): update python docker tag to v3.13.7 (#368)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

backend-py/Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.13.6 AS build
+FROM python:3.13.7 AS build
 
 # Disable cache dir, disable upgrade message, create .venv in project dir
 ARG PIP_NO_CACHE_DIR=off \
@@ -12,7 +12,7 @@ RUN pip install poetry==1.6.1
 RUN poetry install --no-root -vvv --without dev --sync
 
 # Deploy
-FROM python:3.13.6-slim AS deploy
+FROM python:3.13.7-slim AS deploy
 
 # Output to stdout/stderr, don't create .pyc files, etc.
 ENV PYTHONUNBUFFERED=1 \