CC185417: Fixing Typo

Localization team has reported a typo in line 32
Description: "The IOT Extension adds IoT Hub" should be "The Iot Extension adds IoT Hub"

Author: V-vafune

articles/iot-hub/quickstart-send-telemetry-ios.md

@@ -29,7 +29,7 @@ If you don’t have an Azure subscription, create a [free account](https://azure
 - Download the code sample from [Azure samples](https://github.com/Azure-Samples/azure-iot-samples-ios/archive/master.zip)
 - The latest version of [XCode](https://developer.apple.com/xcode/), running the latest version of the iOS SDK. This quickstart was tested with XCode 10.2 and iOS 12.2.
 - The latest version of [CocoaPods](https://guides.cocoapods.org/using/getting-started.html).
-- Run the following command to add the Microsoft Azure IoT Extension for Azure CLI to your Cloud Shell instance. The IOT Extension adds IoT Hub, IoT Edge, and IoT Device Provisioning Service (DPS) specific commands to Azure CLI.
+- Run the following command to add the Microsoft Azure IoT Extension for Azure CLI to your Cloud Shell instance. The IoT Extension adds IoT Hub, IoT Edge, and IoT Device Provisioning Service (DPS) specific commands to Azure CLI.
 
    ```azurecli-interactive
    az extension add --name azure-cli-iot-ext