Follow-up for protected workflow tutorial
These follow-ups from !123872+ should be addressed: - [ ] @aqualls started a [discussion](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/123872#note_1460879194): > - [ ] https://gitlab.com/gitlab-org/gitlab/-/merge_requests/123872#note_1451570594 suggests changing the branch naming to `release/v1.*`. > - [ ] https://gitlab.com/gitlab-org/gitlab/-/merge_requests/123872#note_1461072983 explain why top-level groups are private. It didn't make sense to me either. > - [ ] https://gitlab.com/gitlab-org/gitlab/-/merge_requests/123872#note_1451570510 and https://gitlab.com/gitlab-org/gitlab/-/merge_requests/123872#note_1451889277 describe a different nesting approach for the groups and sub-groups. https://gitlab.com/gitlab-org/gitlab/-/merge_requests/123872#note_1452660818 contains a visual aid for the nesting, and I think one's especially worth including.
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