Bump example app to RNW .72

Bumps example app to RNW .72

Slider has been deprecated from RN, used https://github.com/callstack/react-native-slider instead.
You'll have to manually bump the windows target minimum version in VS2022 to resolve the "Microsoft.UI.Xaml nuget package requires TargetPlatformMinVersion >= 10.0.17763.0 (current project is 15063)" error until https://github.com/ak1394/react-native-tts/pull/244 and https://github.com/callstack/react-native-slider/pull/508 gets merged in and new packages are published on npm.

This has only been tested on RNW, you may want to test on IOS/Android if those are important to you :)

ak1394 / react-native-tts