Add Sweden and remaining Australia regions to Files Pv2.

Author: wmgries

articles/storage/files/understanding-billing.md

@@ -155,6 +155,10 @@ Currently, these SKUs are generally available in a limited subset of regions:
 - New Zealand North
 - Italy North
 - Indonesia Central
+- Sweden Central
+- Sweden South
+- Australia Central
+- Australia Central 2
 
 Storage accounts in regions flagged with an asterisk (*) can only be created using Azure PowerShell or Azure CLI. See [create a storage account](./storage-how-to-create-file-share.md) for more information.