Apply suggestion from @Copilot

Co-authored-by: Copilot <[email protected]>

Author: saewoni

parts/linux/cloud-init/artifacts/aks-hosts-setup.timer

@@ -5,8 +5,8 @@ Before=localdns.service
 [Timer]
 # Run immediately on boot
 OnBootSec=0
-# Run 5 minutes after the last activation (AKS critical FQDN IPs don't change frequently)
-OnUnitActiveSec=5min
+# Run 15 minutes after the last activation (AKS critical FQDN IPs don't change frequently)
+OnUnitActiveSec=15min
 # Timer accuracy (how much systemd can delay)
 AccuracySec=1s
 # Add randomization to avoid thundering herd if multiple nodes boot simultaneously