.gitlab-ci.yml: fix matrix of `publish-dist` job
Every set of combinations must be a single entry in the list
Bug: T329622
How to register an account on GitLab. To prevent spam, new accounts are locked until approved by an admin or the approver bot. You can also file an unlock request to expedite access.
Support: mw:GitLab, how to host a project on GitLab, #wikimedia-gitlab on libera.chat, #GitLab on Phabricator.
Every set of combinations must be a single entry in the list
Bug: T329622