1. - ACM 2.11 and maybe earlier

2. - [ ] Mandatory: Choose the type of documentation change or review.

• [x ] We need to update to an existing topic

• [ ] We need to add a new document to an existing section

• [ ] We need a whole new section; this is a function not
  documented before and doesn't belong in any current section

• [ ] We need an Operator Advisory review and approval

• [ ] We need a z-Stream (Errata) Advisory and Release note
  for MCE and/or ACM

3.
https://docs.redhat.com/en/documentation/red_hat_advanced_cluster_management_for_kubernetes/2.10/html/observability/observability-alerts#disabling-forward-alerts

Chapter 5. Managing observability alerts | Red Hat Product Documentation
Chapter 5. Managing observability alerts | Red Hat Documentation

true should be string

metadata:
annotations:
mco-disable-alerting: "true"