Update disk-storage-zrs-limitations.md

Backup Team added support middle of December https://docs.microsoft.com/en-us/azure/backup/backup-support-matrix-iaas#vm-storage-support

Backup and restore of ZRS disks is supported

Author: carlsyner

includes/disk-storage-zrs-limitations.md

@@ -14,4 +14,4 @@ ZRS for managed disks have the following restrictions:
 
 - Only supported with premium solid-state drives (SSD) and standard SSDs.
 - Currently available only in the West US 2, West Europe, North Europe, and France Central regions.
-- Can't currently be used with Azure Backup or Azure Site Recovery.
+- Can't currently be used with Azure Site Recovery.