Update docs/alertmanager.md
correct typo, add multiple email recipients, adjust group and alert name to match chart values
UNCLASSIFIED - NO CUI
ATTENTION: Immediate action is required to maintain compatibility with P1 services. Please visit https://p1notifications.dso.mil and see the "DSO.MIL Certificates Renewal" announcement under the "Notifications" section for more details.
correct typo, add multiple email recipients, adjust group and alert name to match chart values
UNCLASSIFIED - NO CUI