Bump braces, react-native-fs and react-native-windows in /Example

Bumps [braces](https://github.com/micromatch/braces) to 3.0.2 and updates ancestor dependencies [braces](https://github.com/micromatch/braces), [react-native-fs](https://github.com/itinance/react-native-fs) and [react-native-windows](https://github.com/microsoft/react-native-windows/tree/HEAD/vnext). These dependencies need to be updated together.


Updates `braces` from 1.8.5 to 3.0.2
- [Release notes](https://github.com/micromatch/braces/releases)
- [Changelog](https://github.com/micromatch/braces/blob/master/CHANGELOG.md)
- [Commits](micromatch/braces@1.8.5...3.0.2)

Updates `react-native-fs` from 2.16.6 to 2.20.0
- [Release notes](https://github.com/itinance/react-native-fs/releases)
- [Changelog](https://github.com/itinance/react-native-fs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/itinance/react-native-fs/commits/v2.20.0)

Updates `react-native-windows` from 0.57.2 to 0.71.0
- [Release notes](https://github.com/microsoft/react-native-windows/releases)
- [Changelog](https://github.com/microsoft/react-native-windows/blob/react-native-windows_v0.71.0/vnext/CHANGELOG.md)
- [Commits](https://github.com/microsoft/react-native-windows/commits/react-native-windows_v0.71.0/vnext)

---
updated-dependencies:
- dependency-name: braces
  dependency-type: indirect
- dependency-name: react-native-fs
  dependency-type: direct:production
- dependency-name: react-native-windows
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>