Update toc.yml

Author: msangapu-msft

articles/app-service/toc.yml

@@ -373,6 +373,8 @@
       href: deploy-container-github-action.md
     - name: End-to-end tutorials
       items:
+        - name: Configure a sidecar container
+          href: tutorial-custom-container-sidecar.md
         - name: Deploy app with Azure Container Registry
           href: tutorial-custom-container.md
         - name: Deploy with GitHub Actions