Update swift.md

Author: eric-urban

articles/cognitive-services/Speech-Service/includes/quickstarts/platform/swift.md

@@ -39,7 +39,7 @@ The macOS CocoaPod package is available for download and use with the [Xcode 9.4
     ```
 1. Run `pod install` to install the Speech SDK.
 
-Alternatively, you can download the [binary CocoaPod](https://aka.ms/csspeech/macosbinary) and unzip to extract it's contents. In your Xcode project, add a reference to the extracted "MicrosoftCognitiveServicesSpeech.xcframework" folder and it's contents.
+Alternatively, you can download the [binary CocoaPod](https://aka.ms/csspeech/macosbinary) and unzip to extract its contents. In your Xcode project, add a reference to the extracted "MicrosoftCognitiveServicesSpeech.xcframework" folder and its contents.
 
 > [!NOTE]
 > .NET developers can build native macOS applications by using the Xamarin.Mac application framework. For more information, see [Xamarin.Mac](/xamarin/mac/).