[CI] fix docker tag for master branch
Docker images are built without tags when using branch master (cf docker-chainedci-tools.gitlab-ci.yml). Workaround for using the gating when using the master branch is to use the latest
tag instead
Docker images are built without tags when using branch master (cf docker-chainedci-tools.gitlab-ci.yml). Workaround for using the gating when using the master branch is to use the latest
tag instead