[9.16] fix: test: refresh base image repos before installing from them
Stale repositories cause issue on installation in the docs:pdf
CI job:
E: Failed to fetch http://deb.debian.org/debian/pool/main/s/systemd/libsystemd-shared_252.22-1%7edeb12u1_amd64.deb 404 Not Found [IP: 2a04:4e42:78::644 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
Validation job: https://gitlab.isc.org/isc-projects/bind9/-/jobs/4487570
Backport of MR !9164 (merged)
Edited by Michal Nowak