Changes

On Wednesday, the 16th of July we renamed the master branch of this repository to main.

Required changes

If you run a fork of LocalStack, with an upstream remote set to this repository, you will need to change your branch as well.
Assuming your remote is called "upstream", the upstream branch upstream/master will be tracked by the branch master. To adjust, you will need to run:

git branch -m master main
git fetch upstream
git branch -u upstream/main main
git remote set-head origin -a

It will also make sense to update the default branch on your forks to main.