Merge pull request #298436 from wmgries/rev-pv2-regions

Add Spain Central and New Zealand North.

Author: prmerger-automator[bot]

articles/storage/files/understanding-billing.md

@@ -142,6 +142,8 @@ Currently, these SKUs are generally available in a limited subset of regions:
 - US Gov Texas*
 - Poland Central
 - West US 3
+- Spain Central
+- New Zealand North
 
 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.