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GitHub instructions for renaming a branch: https://docs.github.com/en/github/administering-a-repository/renaming-a-branch
Unfortunately, GitHub won’t auto-forward “master” references to “main”, so everyone with a clone needs to manually rename the branch also.
GitHub provides instructions, but they are three command-line commands, which not everyone is comfortable using.
edX pipelines?
readthedocs: project settings mention “master” as the branch to build.
openedx.yaml files have “openedx_release: {“ref”: “master”}” in them.
confluence process pages that mention master