added lightbox to diagram

Author: AbdullahBell

articles/firewall-manager/secure-hybrid-network.md

@@ -23,7 +23,7 @@ For this tutorial, you create three virtual networks:
 - **VNet-Spoke** - the spoke virtual network represents the workload located on Azure.
 - **VNet-Onprem** - The on-premises virtual network represents an on-premises network. In an actual deployment, it can be connected using either a VPN or ExpressRoute connection. For simplicity, this tutorial uses a VPN gateway connection, and an Azure-located virtual network is used to represent an on-premises network.
 
-![Hybrid network](media/tutorial-hybrid-portal/hybrid-network-firewall.png)
+:::image type="content" source="media/tutorial-hybrid-portal/hybrid-network-firewall.png" alt-text="Diagram of a Azure Firewall Manager hub hybrid network." lightbox="media/tutorial-hybrid-portal/hybrid-network-firewall.png":::
 
 In this tutorial, you learn how to: