Add ACA to TOC

Author: Harikrishnan-M-B

articles/frontdoor/TOC.yml

@@ -127,6 +127,8 @@
         href: how-to-enable-private-link-application-gateway.md
       - name: Connect to Azure API Management
         href: standard-premium/how-to-enable-private-link-apim.md
+      - name: Connect to Azure Container App
+        href: ../container-apps/how-to-integrate-with-azure-front-door.md
   - name: Caching
     items:
     - name: Caching with Azure Front Door