fix other syntax

Author: v-geberr

articles/app-service/tutorial-python-postgresql-app.md

@@ -171,6 +171,7 @@ The creation wizard generated the connectivity variables for you already as [app
     :::column:::
         :::image type="content" source="./media/tutorial-python-postgresql-app/azure-portal-get-connection-string-2.png" alt-text="A screenshot showing how to see the autogenerated connection string." lightbox="./media/tutorial-python-postgresql-app/azure-portal-get-connection-string-2.png":::
     :::column-end:::
+:::row-end:::
 :::row:::
     :::column span="2":::
         **Step 3.** In a terminal or command prompt, run the following Python script to generate a unique secret: `python -c 'import secrets; print(secrets.token_hex())'`. Copy the output value to use in the next step.