Fix transient test failure in protected_branches_access_control_ee.rb
Fixes a transient job failure from !2437 (closed):
https://gitlab.com/gitlab-org/gitlab-ee/-/jobs/22537058
https://gitlab.com/gitlab-org/gitlab-ee/-/jobs/22536928
Fixes a transient job failure from !2437 (closed):
https://gitlab.com/gitlab-org/gitlab-ee/-/jobs/22537058
https://gitlab.com/gitlab-org/gitlab-ee/-/jobs/22536928