Updated PPG support statement.

PPG is currently not supported. Added this info. We will roll out support in late May 2020.

Author: sideeksh

articles/site-recovery/azure-to-azure-support-matrix.md

@@ -174,6 +174,8 @@ Custom images - Third party published | Supported | Supported if the VM runs on
 VMs migrated using Site Recovery | Supported | If a VMware VM or physical machine was migrated to Azure using Site Recovery, you need to uninstall the older version of Mobility service running on the machine, and restart the machine before replicating it to another Azure region.
 RBAC policies | Not supported | Role based Access control (RBAC) policies on VMs are not replicated to the failover VM in target region.
 Extensions | Not supported | Extensions are not replicated to the failover VM in target region. It needs to be installed manually after failover.
+Proximity Placement Groups | Not supported | Virtual machines located inside a Proximity Placement Group cannot be protected using Site Recovery.
+
 
 ## Replicated machines - disk actions