Update debian:13-slim Docker digest to 020c0d2 (release-2026-lts) (#10452)

Update debian:13-slim Docker digest to 020c0d2

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

Author: renovate[bot]

build/Dockerfile

@@ -88,7 +88,7 @@ USER 101
 
 
 ############################################# Base image for Debian with NGINX Plus only #############################################
-FROM debian:13-slim@sha256:28de0877c2189802884ccd20f15ee41c203573bd87bb6b883f5f46362d24c5c2 AS debian-plus-only
+FROM debian:13-slim@sha256:020c0d20b9880058cbe785a9db107156c3c75c2ac944a6aa7ab59f2add76a7bd AS debian-plus-only
 ARG NGINX_PLUS_VERSION
 
 ENV NGINX_VERSION=${NGINX_PLUS_VERSION}