use latest heroku builder
main: use the supported heroku-builder instead of classic
Bug: T352774
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.
main: use the supported heroku-builder instead of classic
Bug: T352774