Merge pull request #234837 from timlt/pytelemetry

Update py instructions

Author: prmerger-automator[bot]

includes/iot-develop-send-telemetry-iot-hub-python.md

@@ -62,7 +62,7 @@ In this section, you use the Python SDK to send messages from a device to your I
 1. Install the Azure IoT Python SDK:
 
     ```console
-    pip3 install azure-iot-device
+    pip install azure-iot-device==3.0.0b2
     ```
 1. Set the following environment variables, to enable your device to connect to Azure IoT.
     * Set an environment variable called `IOTHUB_DEVICE_CONNECTION_STRING`. For the variable value, use the device connection string that you saved in the previous section.
@@ -94,7 +94,7 @@ In this section, you use the Python SDK to send messages from a device to your I
 1. Run the code for the following sample file.
 
     ```console
-    pip install azure-iot-device==3.0.0b2
+    python iothub_simple_telemetry.py
     ```
     > [!NOTE]
     > This code sample uses Azure IoT Plug and Play, which lets you integrate smart devices into your solutions without any manual configuration.  By default, most samples in this documentation use IoT Plug and Play. To learn more about the advantages of IoT Plug and Play, and cases for using or not using it, see [What is IoT Plug and Play?](../articles/iot-develop/overview-iot-plug-and-play.md).