Update accelerated-networking-overview.md to clarify driver update

Updated page to clarify that the platform does not update the VF driver in the guest OS and provide guidance to customers on how to update the driver as needed.

Author: davegoddard

articles/virtual-network/accelerated-networking-overview.md

@@ -44,6 +44,8 @@ Accelerated Networking has the following benefits:
 
 - You can't deploy virtual machines (classic) with Accelerated Networking through Azure Resource Manager.
 
+- The Azure platform does not update the Mellanox NIC drivers in the VM. For VMs running Linux and FreeBSD, customers are encouraged to stay current with the latest kernel updates offered by the distribution. For VMs running Windows, customers should apply updated drivers from the Nvidia support page if any issues are later encountered with the driver delivered with the Marketplace image or applied to a custom image.
+
 ### Supported regions
 
 Accelerated Networking is available in all global Azure regions and the Azure Government Cloud.