https://github.com/actions/virtual-environments/issues/5583
> GitHub Actions is starting the deprecation process for macOS 10.15. While the image is being deprecated, You may experience longer queue times during peak usage hours. Deprecation will begin on 5/31/2022 and the image will be fully unsupported by 8/30/2022
They also made the Monterey image available to all users, but I cannot test it due to the lack of the necessary CI files (https://github.com/macports/macports-ci-files/releases/tag/v2.7.2).
OpenPGP_0x67D486317A51FABE.asc
Description: OpenPGP public key
OpenPGP_signature
Description: OpenPGP digital signature