Document that we use the user group for @contributor-comms and the exact value so we don't need to peek in the running cluster when update our instance next.
Needs approval from an approver in each of these files:
- ~~[OWNERS](https://github.com/kubernetes-sigs/slack-infra/blob/main/OWNERS)~~ [nikhita]
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Document that we use the user group for
@contributor-comms
and the exact value so we don't need to peek in the running cluster when update our instance next.