Configure TLS for Alertmanager - #1989

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5, peter-evans/create-or-update-comment@71345be0265236311c031f5c7866368bd1eff043, peter-evans/find-comment@3eae4d37986fb5a8592848f6a574fdf654e61f9e. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/