deps(docker): bump bitnami/mongodb in /docker/mongodb

Bumps bitnami/mongodb from 7.0-debian-11 to 7.0-debian-12.

---
updated-dependencies:
- dependency-name: bitnami/mongodb
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

docker/mongodb/Dockerfile

@@ -3,7 +3,7 @@
 ARG TOOLS_IMAGE
 FROM ${TOOLS_IMAGE} AS TOOLS_IMAGE
 
-FROM bitnami/mongodb:7.0-debian-11
+FROM bitnami/mongodb:7.0-debian-12
 
 LABEL maintainer="Tom Manville <tom@kasten.io>"