Summary

There is a new branch protection setting ("ruleset") which this tutorial is not aware of.

How to reproduce

1. Complete Steps 1-3, so the current one is Step 4: Add branch protections
2. Follow the first step in the Activity: Add branch protections:
   Go to Branches settings. You can navigate to that page manually by selecting the right-most tab in the top of the repository called Settings and then clicking Branches.
3. Notice that there are two settings available: Add branch ruleset and Add classic branch protection rule, which are not consistent with step 2:
   Click Add branch protection rule under "Branch protection rules".

Additional context

Please update the tutorial so it uses the new branch ruleset (better) or change it so it's clear to use a classic branch protection rule (worse, but acceptable as a hotfix).