chore(docker): bump Kafka image base from debian:bullseye-slim to trixie-slim

debian:bullseye-slim's officially reached its end-of-life and concluded
its Long Term Support (LTS) on August 31, 2026. Move to trixie (Debian 13),
the current stable release.

Author: azun

docker/kafka/Dockerfile

@@ -34,7 +34,7 @@ RUN apk add --no-cache gnupg wget && \
 
 
 # backported from https://github.com/docker-library/openjdk/blob/master/18/jdk/slim-bullseye/Dockerfile
-FROM debian:bullseye-slim@sha256:e5b6442dd2e9684cf5e87d8338b5968f3b348636fc0be6d7850a381e3731a2bd
+FROM debian:trixie-slim@sha256:d7e12182ce18b85b93007c1dedf31f2d29e01ccf3182cc4017c709b6259bc132
 
 ARG scala_version
 ARG KAFKA_VERSION