This is a tracking FR that can be closed when the default branch of this repo is renamed from master to main. For more context, see ampproject/amphtml#32195 and this plan.

I'm not sure what other changes need to go in to amphtml or amp-github-apps or elsewhere in order to let error reporting continue to work. Happy to make any changes you think are needed.

/cc @rcebulko and @jridgewell for visibility and guidance on how to proceed.