Depending on how many thousands of $ per year, it would probably be cheaper and more reliable to self-host GitLab. It's better in terms of organisational structure (you can have one, including access and secret inheritance), and (personal view) Gitlab-CI is better than GitHub Actions because it doesn't push you towards a JavaScript/NPM style dependency hell. And it's actually fairly easy to self-hosted, with options from a single machine with an omnibus package that handles everything to a full blown autoscaling Kubernetes deployment.