feat: add note for c2
What
Add not for silenced alerts for C2 related to incident https://gitlab.com/gitlab-com/gl-infra/gitlab-dedicated/incident-management/-/issues/286
Alert 1: https://gitlab.pagerduty.com/incidents/Q2X5JFW2PEHXVA
Alert 2: https://gitlab.pagerduty.com/incidents/Q3Y14MYAY0K1V6
Why
Missing not for c2 customer
Edited by Oriol Lluch