Update docker.io/python Docker tag to v3.13.9

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

Author: renovate[bot]

Dockerfile

@@ -1,6 +1,6 @@
 FROM docker.io/golang:1.25.4 AS golang
 
-FROM docker.io/python:3.12.12-slim-bookworm AS base
+FROM docker.io/python:3.13.9-slim-bookworm AS base
 
 ARG TARGETARCH
 ENV TARGETARCH=${TARGETARCH:-amd64}