build-image: Refresh the base images during the builds

A --pull was missing so the base image (python 3.10 mostly) is never refreshed

changed milestone to %Design and test a Continuous Deployment infrastructure [Roadmap - Tooling and infrastructure]

assigned to @vsellier

Jenkins job jenkins-tools/swh-jenkins-jobs-builder #228 succeeded .
See Console Output and Coverage Report for more details.

approved this merge request

merged

Thanks!