Adding keywords

Author: RoseHJM

articles/dev-box/toc.yml

@@ -174,6 +174,7 @@ items:
     items:
       - name: 'Reference: imagedefinition.yaml and task.yaml files'
         href: reference-dev-box-customizations.md
+        displayName: Customize, schema, yaml, imagedefinition, task
       - name: Install Azure CLI devcenter extension
         href: how-to-install-dev-box-cli.md
       - name: Azure CLI - az devcenter