Merge pull request #293893 from wmgries/rev-pv2-regions

Add uksouth and ukwest to list of HDD Pv2 regions.

Author: prmerger-automator[bot]

articles/storage/files/understanding-billing.md

@@ -117,6 +117,8 @@ Currently, these SKUs are generally available in a limited subset of regions:
 - North Europe
 - Germany West Central
 - Germany North
+- UK South
+- UK West
 
 ### Provisioned v2 provisioning detail
 When you create a provisioned v2 file share, you specify the provisioned capacity for the file share in terms of storage, IOPS, and throughput. File shares are limited based on the following attributes: