Merge pull request #289203 from wmgries/rev-pv2-regions

Add additional regions to Azure Files provisioned v2 support list (westus2 and westcentralus)

Author: prmerger-automator[bot]

articles/storage/files/understanding-billing.md

@@ -101,6 +101,8 @@ Currently, these SKUs are generally available in a limited subset of regions:
 - Australia Southeast
 - East Asia
 - Southeast Asia
+- West US 2
+- West Central US
 
 ### 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: