added Linux vms pricing link

Author: bandersmsft

articles/cost-management-billing/azure-hybrid-benefits/index.yml

@@ -137,6 +137,8 @@ additionalContent:
               url: https://www.microsoft.com/windows-server/pricing
             - text: SQL Server 2022 - Pricing
               url: https://www.microsoft.com/sql-server/sql-server-2022-pricing
+            - text: Linux Server VMs in Azure – Pricing
+              url: https://azure.microsoft.com/pricing/details/virtual-machines/linux/
         # Card
         - title: Other ways to save on Azure services
           links: