Enhance documentation with Azure training resources

Added links to Azure training modules for virtual networks and configuration.

Author: staleycyn

Instructions/Exercises/M01-Unit 4 Design and implement a Virtual Network in Azure.md

@@ -178,6 +178,7 @@ Copilot can assist you in learning how to use the Azure scripting tools. Copilot
 ## Learn more with self-paced training
 
 + [Introduction to Azure Virtual Networks](https://learn.microsoft.com/training/modules/introduction-to-azure-virtual-networks/). In this module, you learn how to design and implement Azure networking services. You learn about virtual networks, public and private IPs, DNS, virtual network peering, routing, and Azure Virtual NAT.
++ [Configure Virtual Networks](https://learn.microsoft.com/training/modules/configure-virtual-networks/). Learn to configure virtual networks and subnets, including IP addressing.
 
 ## Key takeaways