Update TOC.yml

Author: mksuni

articles/postgresql/TOC.yml

@@ -457,7 +457,7 @@
       - name: Create a web app in a virtual network
         href: flexible-server/tutorial-webapp-server-vnet.md
       - name: Deploy a Django app on App Service
-        href: flexible-server/tutorial-django-app-service-postgres.md
+        href: ../app-service/tutorial-python-postgresql-app?tabs=bash%2Cclone&pivots=postgres-flexible-server
   - name: Concepts
     items:
     - name: Servers