Fix typo in branch protection's pull_request_bypassers test

[reedloden]

s/dismiss_stale_reviews/pull_request_bypassers/

[reedloden]

I'm slightly concerned that this worked until now. Is this test actually testing the right thing?

[github-actions]

👋 Hey Friends, this pull request has been automatically marked as stale because it has no recent activity. It will be closed if no further activity occurs. Please add the Status: Pinned label if you feel that this issue needs to remain open/active. Thank you for your contributions and help in keeping things tidy!

[kfcampbell]

@reedloden the short answer is that our tests are in an unhealthy state, as I've hinted at in #1414. These tests are not run automatically on PRs due to resource constraints. There was an attempt at labelling automation that could trigger test runs, though I don't have access to any of the test accounts configured. There's a long-overdue overhaul in testing waiting to be done, and it's particularly difficult in this instance due to the surface area of the provider and the resource costs of integration testing.

In any event, thank you for noticing and fixing this particular instance!