Clarify Az.DataMigration module description (#28787)

Author: abhims14

src/DataMigration/DataMigration/help/Az.DataMigration.md

@@ -8,7 +8,7 @@ Locale: en-US
 
 # Az.DataMigration Module
 ## Description
-{{Azure DataMigration Service Module}}
+Microsoft Azure PowerShell: Azure DataMigration Service Module
 
 ## Az.DataMigration Cmdlets
 ### [Get-AzDataMigrationAssessment](Get-AzDataMigrationAssessment.md)