Update TOC.yml

added in Ubuntu Pro upgrade doc 9already published

Author: ChaseCrum

articles/virtual-machines/TOC.yml

@@ -135,6 +135,8 @@
   items:
   - name: Red Hat
     href: ./workloads/redhat/overview.md
+  - name: Ubuntu
+    href: ./workloads/canonical/ubuntu-pro-in-place-upgrade.md
   - name: OpenShift
     items:
     - name: OpenShift Container Platform 4.x