What is the process for working groups to add or remove organizers/maintainers

[sudo-bmitch]

Our governance template doesn't call this out how working groups can add or remove maintainers, and I didn't see details in the TOB governance for the group itself to vote without requesting a TOB intervention.

What should the voting process be (2/3rds vote by Github or similar method?) and how do we update the existing groups to reflect that policy?