Fix a warning message (#27105)

Author: blueww

src/Storage/Storage.Autorest/custom/Start-AzStorageAccountMigration.ps1

@@ -202,7 +202,7 @@ param(
 )
 
     process {
-        Write-Warning("After your request to convert the account’s redundancy configuration is validated, the conversion will typically complete in a few days, but can take a few weeks depending on current resource demands in the region, account size, and other factors. The conversion can’t be stopped after being initiated, and for accounts with geo redundancy a failover can’t be initiated while conversion is in progress. The data within the storage account will continue to be accessible with no loss of durability or availability.")
+        Write-Warning("After your request to convert the account's redundancy configuration is validated, the conversion will typically complete in a few days, but can take a few weeks depending on current resource demands in the region, account size, and other factors. The conversion can't be stopped after being initiated, and for accounts with geo redundancy a failover can't be initiated while conversion is in progress. The data within the storage account will continue to be accessible with no loss of durability or availability.")
         Az.Storage.internal\Start-AzStorageAccountMigration @PSBoundParameters
     }
 }