Update overview-about.md to include banner

Author: MutemwaRMasheke

articles/automanage/overview-about.md

@@ -12,6 +12,9 @@ ms.custom: overview
 # Azure Automanage machine best practices
 
 > [!CAUTION]
+> On September 30, 2027, the Azure Automanage Best Practices service will be retired. As a result, attempting to create a new configuration profile or onboarding a new subscription to the service will result in an error. Learn more [here](https://aka.ms/automanagemigration/) about how to migrate to Azure Policy before that date. 
+
+> [!IMPORTANT]
 > On 31 August 2024, both Automation Update Management and the Log Analytics agent it uses will be retired. Migrate to Azure Update Manager before that. Refer to guidance on migrating to Azure Update Manager [here](/azure/update-manager/guidance-migration-automation-update-management-azure-update-manager?WT.mc_id=Portal-Microsoft_Azure_Automation). [Migrate Now](https://portal.azure.com/).
 
 This article covers information about Azure Automanage machine best practices, which have the following benefits: