Update formatting.

Author: MikeRayMSFT

docs/sql-server/azure-arc/configure-windows-accounts-agent.md

@@ -23,7 +23,8 @@ The extension sets permissions when you enable features on the Azure portal. If
 
 [SQL permissions](#sql-permissions) lists the permissions tied to features that the extension grants when features are enabled.
 
-Note: NT Authority\System must have access to modify permissions on listed directories and registry keys. This is needed so that NT Authority\System can grant required access to NT Service\SqlServerExtension account for least privileges mode.
+> [!NOTE]
+> `NT Authority\System` must have access to modify permissions on listed directories and registry keys. This is needed so that `NT Authority\System` can grant required access to `NT Service\SqlServerExtension` account for least privileges mode.
 
 ## Directory permissions