build(deps): bump python in /kafka_events/demo/setup

Bumps python from 3.9-alpine to 3.13-alpine.

---
updated-dependencies:
- dependency-name: python
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

kafka_events/demo/setup/Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.9-alpine AS base
+FROM python:3.13-alpine AS base
 WORKDIR /usr/src/app
 RUN apk update && \
  apk add \
@@ -20,7 +20,7 @@ COPY ./pyproject.toml ./poetry.lock ./
 RUN poetry install --no-dev
 
 # Copy virtual environment into clean base
-FROM python:3.9-alpine as main
+FROM python:3.13-alpine as main
 WORKDIR /usr/src/app
 COPY --from=base /usr/src/app /usr/src/app
 ENV PATH="/usr/src/app/.venv/bin:$PATH"