Merge pull request #242625 from Nickomang/aks-gh-planned-maintenance

Added note on running latest AZ CLI version

Author: prmerger-automator[bot]

articles/aks/planned-maintenance.md

@@ -29,6 +29,8 @@ To configure Planned Maintenance using pre-created configurations, see [Use Plan
 
 This article assumes that you have an existing AKS cluster. If you need an AKS cluster, see the AKS quickstart [using the Azure CLI][aks-quickstart-cli], [using Azure PowerShell][aks-quickstart-powershell], or [using the Azure portal][aks-quickstart-portal].
 
+Be sure to upgrade Azure CLI to the latest version using [`az upgrade`](/cli/azure/update-azure-cli#manual-update).
+
 [!INCLUDE [preview features callout](./includes/preview/preview-callout.md)]
 
 ### Limitations