update toc entry

Author: duongau

articles/frontdoor/TOC.yml

@@ -322,8 +322,8 @@
             href: standard-premium/how-to-enable-private-link-web-app.md
           - name: Azure CLI
             href: standard-premium/how-to-enable-private-link-web-app-cli.md
-        - name: Connect to an application gateway (preview)
-          href: standard-premium/how-to-enable-private-link-application-gateway.md
+        - name: Connect to an pplication aateway
+          href: how-to-enable-private-link-application-gateway.md
       - name: Monitor and reports
         items:
         - name: Configure diagnostic logs