Merge pull request #298 from kubevirt/gh_actions/update_metrics_docs

Update metrics documentation

Author: sradco

docs/metrics.md

@@ -36,6 +36,9 @@ Version information. Type: Gauge.
 ### kubevirt_memory_delta_from_requested_bytes
 The delta between the pod with highest memory working set or rss and its requested memory for each container, virt-controller, virt-handler, virt-api and virt-operator. Type: Gauge.
 
+### kubevirt_node_deprecated_machine_types
+List of deprecated machine types based on the capabilities of individual nodes, as detected by virt-handler. Type: Gauge.
+
 ### kubevirt_nodes_with_kvm
 The number of nodes in the cluster that have the devices.kubevirt.io/kvm resource available. Type: Gauge.