Valid scope values of the connection auth method object

The scope value of the connection auth method object can be also `module` when device module sends telemetry message.

Author: Dietatko

articles/iot-hub/iot-hub-devguide-messages-construct.md

@@ -153,7 +153,7 @@ The **iothub-connection-auth-method** property contains a JSON serialized object
 
 ```json
 {
-  "scope": "{ hub | device }",
+  "scope": "{ hub | device | module }",
   "type": "{ symkey | sas | x509 }",
   "issuer": "iothub"
 }
@@ -163,4 +163,4 @@ The **iothub-connection-auth-method** property contains a JSON serialized object
 
 * For information about message size limits in IoT Hub, see [IoT Hub quotas and throttling](iot-hub-devguide-quotas-throttling.md).
 
-* To learn how to create and read IoT Hub messages in various programming languages, see the [Quickstarts](../iot-develop/quickstart-send-telemetry-iot-hub.md?pivots=programming-language-nodejs).
+* To learn how to create and read IoT Hub messages in various programming languages, see the [Quickstarts](../iot-develop/quickstart-send-telemetry-iot-hub.md?pivots=programming-language-nodejs).