Details
We've changed the default branch from master to main. Update the docs accordingly.
Motivation
Docs should be accurate.
Context
We also had documentation that linked to master in links.json and links-review.json. It turns out both main and master work there, so I updated those links to main as well. I randomly checked a few dozen of the new links with 100% success, but I didn't quite get to verifying all 1500+ of them.
I find myself copy-pasting these commands occasionally and the > characters have to be removed. It would be easier if I could copy them at once to run.