Add Virtual Machine Metablob Disk section to TOC

Author: linuxelf001

articles/confidential-computing/TOC.yml

@@ -67,6 +67,8 @@
       href: how-to-create-custom-image-confidential-vm.md
     - name: How to migrate nested confidential VMs from one region to another
       href: migrate-nested-confidential-vms.md
+    - name: Virtual Machine Metablob Disk
+      href: virtual-machine-metablob-disk.md
     - name: Quickly create confidential VMs
       items:
       - name: Create VM through the Azure portal