Update Configure stage team names -> Orchestration, System

FYI @nicholasklick since this moves your team page. I did notice though that there isn't any content on there now so you may wish to update it. It appears all your content is on this out of date URL https://about.gitlab.com/handbook/engineering/ops/serverless/ that wasn't linked to from this page anyway.

Renaming the team pages since !29377 (merged)