Docs: Update alerting opt-in page (#35285)
Docs: Update alerting opt-in page (#35285)

* Alerting: Update opt-in docs

* Apply suggestions from code review

Co-authored-by: achatterjee-grafana <5ed7255a3b2540ccce8f5b30c47e4a93678b261d@users.noreply.github.com>

Co-authored-by: achatterjee-grafana <5ed7255a3b2540ccce8f5b30c47e4a93678b261d@users.noreply.github.com>
grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana,grafana/grafana