Update python Docker tag to v3.13

Signed-off-by: Mend Renovate <[email protected]>

Dockerfile

@@ -1,6 +1,6 @@
 # This Dockerfile is based on the pattern recommended by the pipenv docs:
 # https://pipenv.pypa.io/en/latest/docker.html
-FROM python:3.12@sha256:9f8087a3fd7cff8f017fc10227e48ce25aa4f2dcdacc51c23cd6d345d284316a as builder
+FROM python:3.13@sha256:30fca17ea778333427e095abb591d0b3e7de5f816a02871018cb8fc91e6555c6 as builder
 
 RUN pip install --no-cache-dir pipenv==2023.12.1
 ENV PIPENV_VENV_IN_PROJECT=1
@@ -11,7 +11,7 @@ RUN pipenv --no-site-packages install -v --deploy
 
 
 ############################################################
-FROM python:3.12-slim@sha256:7bcc7d0dd5a26323b74ac8f457d2039050c79bf9146d39dda7efed2ec51f7615 as final
+FROM python:3.13-slim@sha256:4c3aac2d0fa7d2f924bcd4b07a82a17553fd5730e5c5a7463bda444e950a644e as final
 
 RUN adduser --uid 19876 summarizer-bot && \
     mkdir /app && \