Assign IoT SDK to correct service

The Azure IoT SDK ref docs are currently assigned to the **iot-suite** service. they should be assigned to the **iot-hub** service.

docfx.json

@@ -100,7 +100,7 @@
         "docs-ref-autogen/com.microsoft.azure.management.storage**.yml": "storage",
         "docs-ref-autogen/com.microsoft.azure.management.trafficmanager**.yml": "traffic-manager",
         "docs-ref-autogen/com.microsoft.azure.management.website**.yml": "websites",
-        "docs-ref-autogen/com.microsoft.azure.sdk.iot**.yml": "iot-suite",   
+        "docs-ref-autogen/com.microsoft.azure.sdk.iot**.yml": "iot-hub",   
         "docs-ref-autogen/com.microsoft.azure.servicebus**.yml": "service-bus",
         "docs-ref-autogen/com.microsoft.azure.storage**.yml": "storage",
         "docs-ref-autogen/microsoft.servicefabric.**.yml": "service-fabric",