[Doc-a-thon] Updating control-plane-metrics.md

Author: mattmcinnes

articles/azure-resource-manager/management/control-plane-metrics.md

@@ -3,7 +3,7 @@ title: Control plane metrics in Azure Monitor
 description: Azure Resource Manager metrics in Azure Monitor | Traffic and latency observability for subscription-level control plane requests
 ms.topic: conceptual
 ms.custom: devx-track-arm-template
-ms.date: 12/01/2021
+ms.date: 04/26/2023
 ---
 
 # Azure Resource Manager metrics in Azure Monitor