Update index.yml

Author: cynthn

articles/index.yml

@@ -503,7 +503,7 @@ productDirectory:
         - containers
       url: container-instances/index.yml
     # Card
-    - title: Linux Virtual Machines
+    - title: Virtual Machines
       summary: Provision virtual machines for Ubuntu, Red Hat, Windows and more
       imageSrc: https://static.docs.com/ui/media/product/azure/virtual-machine.svg
       azureCategories: