Verify that Read the Docs is building after master -> main

[jsignell]

Spotted on dask/dask-cloudprovider#244 (comment). Read The Docs was still building latest from the master branch and builds were failing. It was configured to build from the default branch, but had cached the value master somewhere. Manually pointing it to main in the RtD control panel fixed things.

[andersy005]

@jsignell, thanks for tracking this down. I changed the settings in the RTD control panel. However, the webhook doesn't seem to be working. When I try re-syncing the webhook, I get permissions errors because I don't have admin privileges on this repository:

I just added you as a maintainer on the RTD project. Could you try re-syncing the webhook when you get a moment?

[jsignell]

I clicked the "resync webhook" button and it seemed to work. I am unsure of how to verify though :)

[jsignell]

I think it's all good now. The revision of the docs matches the latest commit on main. Thanks for the ping @andersy005!