This is my collection of shared github actions workflows I use for my projects.
For Ansible Galaxy you may want to set github_branch to main if you don't use the master in meta/main.yml:
galaxy_info:
# Optionally specify the branch Galaxy will use when accessing the GitHub
# repo for this role. During role install, if no tags are available,
# Galaxy will use this branch. During import Galaxy will access files on
# this branch. If Travis integration is configured, only notifications for this
# branch will be accepted. Otherwise, in all cases, the repo's default branch
# (usually master) will be used.
github_branch: main