builds-api: use the non-deprecated heroku builder
The classic version of the builder has been deprecated, and now only
the regular named one is supported.
Bug: T352774 Signed-off-by: David Caro dcaro@wikimedia.org
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Support: mw:GitLab, how to host a project on GitLab, #wikimedia-gitlab on libera.chat, #GitLab on Phabricator.
The classic version of the builder has been deprecated, and now only
the regular named one is supported.
Bug: T352774 Signed-off-by: David Caro dcaro@wikimedia.org