Rename "master" to "main" on https://github.com/unicode-org/icu/tree/master
Please rename "master" to "main" in accordance with GitHub's recommendation to promote inclusivity on our project. It should take no more than 5 minutes. Here are guidelines - See: https://github.com/github/renaming#renaming-existing-branches
This is now done in several unicode-org github repositories: branches renamed, instructions updated, links also updated (even though there’s a master->main redirect for old links).
Not yet done: updating plenty more instructions on the ICU-TC site (http://site.icu-project.org/).
We intend to do this the week after the release candidate: March 24-25.