added additional indentation for command lines code.

Author: rezasherafat

articles/iot-hub/virtual-network-support.md

@@ -75,9 +75,9 @@ To set up a private endpoint, follow these steps:
 
 1. Run the following Azure CLI command to re-register Azure IoT Hub provider with your subscription:
 
-```azurecli-interactive
+    ```azurecli-interactive
     az provider register --namespace Microsoft.Devices --wait --subscription  <subscription-name>
-```
+    ```
 
 2. Navigate to the **Private endpoint connections** tab in your IoT Hub portal (this tab is only available for in IoT Hubs in the [supported regions](#regional-availability-private-endpoints)), and click the **+** sign to add a new private endpoint.