MDB - Added customizations reference to ToC & Landing page

Author: RoseHJM

articles/dev-box/index.yml

@@ -96,6 +96,8 @@ landingContent:
             url: how-to-configure-customization-imaging.md
           - text: Create customization tasks
             url: how-to-create-customization-tasks-catalog.md
+          - text: 'Reference: imagedefinition.yaml and task.yaml files'
+            url: reference-dev-box-customizations.md
 
    # Card
   - title: Support & Reference

articles/dev-box/toc.yml

@@ -172,6 +172,8 @@ items:
         href: how-to-get-help.md
   - name: Reference
     items:
+      - name: 'Reference: imagedefinition.yaml and task.yaml files'
+        href: reference-dev-box-customizations.md
       - name: Install Azure CLI devcenter extension
         href: how-to-install-dev-box-cli.md
       - name: Azure CLI - az devcenter