Update Get-MailTrafficTopReport.md

@chrisda  let use this link here: https://docs.microsoft.com/en-us/powershell/module/exchange/get-mailtrafficsummaryreport?view=exchange-ps

Author: faoquong

exchange/exchange-ps/exchange/Get-MailTrafficTopReport.md

@@ -14,7 +14,7 @@ ms.reviewer:
 ## SYNOPSIS
 This cmdlet is available only in the cloud-based service.
 
-**Note**: This cmdlet is in the process of being deprecated. Use the Get-MailTrafficATPReport and Get-MailDetailATPReport cmdlets instead.
+**Note**: This cmdlet is in the process of being deprecated. Use the Get-MailTrafficSummaryReport cmdlet instead.
 
 Use the Get-MailTrafficTopReport cmdlet to view a report of the highest volume senders, recipients, malware recipients and spam recipients in your organization.