Document how Codeowners works for subgroups
Problem to solve
Many users including GitLab use subgroups to organize members. Users often get confused about how to get subgroups to work with codeowners
Yeah, I think the documentation is actually in a good place overall after taking another look. However, I think the reason we missed this is due to there being no explicit subgroup example and the fact that there's no actual call out that subgroups need to be shared for them to work with code owners.
Customer ticket example (internal): https://gitlab.zendesk.com/agent/tickets/159432
Update codeowners page: https://docs.gitlab.com/ee/user/project/code_owners.html