chore(deps): bump debian in /build in the docker-images group

Bumps the docker-images group in /build with 1 update: debian.


Updates `debian` from 12-slim to 13-slim

---
updated-dependencies:
- dependency-name: debian
  dependency-version: 13-slim
  dependency-type: direct:production
  dependency-group: docker-images
...

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

Author: dependabot[bot]

build/Dockerfile

@@ -269,7 +269,7 @@ RUN --mount=type=bind,from=alpine-fips-3.19,target=/tmp/fips/ \
 
 
 ############################################# Base image for Debian with NGINX Plus only #############################################
-FROM debian:12-slim@sha256:df52e55e3361a81ac1bead266f3373ee55d29aa50cf0975d440c2be3483d8ed3 AS debian-plus-only
+FROM debian:13-slim@sha256:c2880112cc5c61e1200c26f106e4123627b49726375eb5846313da9cca117337 AS debian-plus-only
 ARG NGINX_PLUS_VERSION
 
 ENV NGINX_VERSION=${NGINX_PLUS_VERSION}