Add Scenarios section

Add scenarios section that notes support for Vnet peering and UDR

Author: mialdrid

articles/expressroute/about-fastpath.md

@@ -30,12 +30,16 @@ To configure FastPath, the virtual network gateway must be either:
 * Ultra Performance
 * ErGw3AZ
 
-**VNet Peering** - FastPath will send traffic directly to any VM deployed in a virtual network peered to the one connected to ExpressRoute, bypassing the ExpressRoute virtual network gateway. This feature is available for both IPv4 and IPv6 connectivity.
+## Scenarios
+
+### VNet Peering
+FastPath will send traffic directly to any VM deployed in a virtual network peered to the one connected to ExpressRoute, bypassing the ExpressRoute virtual network gateway. This feature is available for both IPv4 and IPv6 connectivity.
 
 > [!NOTE]
 > * FastPath Vnet peering connectivity is not supported for Azure Dedicated workloads.
 
-**User Defined Routes (UDRs)** - FastPath will honor UDRs configured on the GatewaySubnet and send traffic directly to an Azure Firewall or third party NVA.
+## User Defined Routes (UDRs)
+FastPath will honor UDRs configured on the GatewaySubnet and send traffic directly to an Azure Firewall or third party NVA.
 
 > [!NOTE]
 > * FastPath UDR connectivity is not supported for Azure Dedicated workloads.