Docs feedback: Ambiguous sections about merge request approvals

We have two sections about how to override the merge request approvals default settings. One is dedicated to premium tier but it makes the reading a bit ambiguous.

https://docs.gitlab.com/ee/user/project/merge_requests/merge_request_approvals.html#overriding-the-merge-request-approvals-default-settings

and

https://docs.gitlab.com/ee/user/project/merge_requests/merge_request_approvals.html#overriding-merge-request-approvals-default-settings-premium