[metrics-alerts] NeedsRebootGroup Some bookworm servers need to reboot

Total firing alerts: 1 ## Firing Alerts ----- Time: 2026-08-26 20:36:18.867 +0000 UTC Summary: Some bookworm servers need to reboot Description: Found pending kernel or microcode upgrades on 6 hosts running bookworm. dashboard: https://grafana.torproject.org/d/wUmZB05Zk/tpo-overview?viewPanel=panel-21 playbook: https://gitlab.torproject.org/tpo/tpa/team/-/wikis/howto/reboots -----