This is my first comment on HN despite being a user for over a decade -- this is one of the most outrageous pricing changes I've encountered - I couldn't believe it when I read the email earlier (I run self-hosted runners). Anyone using GitLab or any other VCM that you'd recommend? I'm absolutely done with Github. Or is everything else just as bad?
And the best (maybe?) part in your case is that the CI is based on GH Actions, so you can probably reuse your workflows without the need to adapt them.