Adding Free tier

The same features in standard is covered in free tier

Author: AltaOhms

includes/iot-hub-basic-whole.md

@@ -10,4 +10,4 @@
  ms.custom: include file
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 >[!NOTE]
->The features described in this article are available only in the standard tier of IoT Hub. For more information about the basic and standard IoT Hub tiers, see [Choose the right IoT Hub tier](../articles/iot-hub/iot-hub-scaling.md).
+>The features described in this article are available only in the standard tier of IoT Hub. For more information about the basic and standard/free IoT Hub tiers, see [Choose the right IoT Hub tier](../articles/iot-hub/iot-hub-scaling.md).