Update toc.yml

Author: mimckitt

articles/virtual-machines/linux/toc.yml

@@ -518,6 +518,8 @@
       href: create-cli-availability-zone.md
   - name: Use automation tools
     items:
+    - name: Custom data
+      href: ../custom-data.md
     - name: Ansible
       items:
       - name: Install and configure