Reports wrong detection time

[Ronilerr]

What happened:
In VirtControllerDown runbook description of detection time is wrong.
In https://github.com/kubevirt/kubevirt/blob/9b34e90da5e8e6c9a6a90da58e3368286a8d4ae0/pkg/monitoring/rules/alerts/virt-controller.go#L56 we can see the detection time is 10 min but here it is written 5 min

What you expected to happen:
The detection time should be 10 min

Environment:

• KubeVirt version (use virtctl version): N/A
• Kubernetes version (use kubectl version): N/A
• VM or VMI specifications: N/A
• Cloud provider or hardware configuration: N/A
• OS (e.g. from /etc/os-release): N/A
• Kernel (e.g. uname -a): N/A
• Install tools: N/A
• Others: N/A