Update Whats-new.md (#626)

* Update Whats-new.md

* Update docs/wiki/Whats-new.md

Co-authored-by: Jack Tracey <41163455+jtracey93@users.noreply.github.com>

docs/wiki/Whats-new.md

@@ -38,6 +38,7 @@ Here's what's changed in Enterprise Scale:
 - [Testing approach for enterprise-scale](https://docs.microsoft.com/azure/cloud-adoption-framework/ready/enterprise-scale/testing-approach) CAF document released
 - Updated [pricing section](https://github.com/Azure/Enterprise-Scale/wiki/What-is-Enterprise-Scale#pricing) on "What is Enterprise Scale" wiki page to provide further clarity.
 - Updated [DNS for on-premises and Azure resources](https://docs.microsoft.com/azure/cloud-adoption-framework/ready/azure-best-practices/dns-for-on-premises-and-azure-resources) - related to issue [#609](https://github.com/Azure/Enterprise-Scale/issues/609)
+- Update [Hub & Spoke](https://docs.microsoft.com/azure/cloud-adoption-framework/ready/azure-best-practices/traditional-azure-networking-topology)) guidance related to BGP propagation on UDRs for transit connectivity - to close issue [#618](https://github.com/Azure/Enterprise-Scale/issues/618)
 - Added guidance to [Management group and subscription organization - CAF Docs](https://docs.microsoft.com/azure/cloud-adoption-framework/ready/enterprise-scale/management-group-and-subscription-organization#configure-subscription-tenant-transfer-restrictions) for [Azure Subscription Policies](https://docs.microsoft.com/azure/cost-management-billing/manage/manage-azure-subscription-policy), which allow you to control Azure Subscription Tenant transfers to/from your AAD Tenant.
 
 #### Tooling