Bump react-devtools-core and react-native in /example

Bumps [react-devtools-core](https://github.com/facebook/react/tree/HEAD/packages/react-devtools-core) to 4.28.5 and updates ancestor dependency [react-native](https://github.com/facebook/react-native/tree/HEAD/packages/react-native). These dependencies need to be updated together.


Updates `react-devtools-core` from 4.24.0 to 4.28.5
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/HEAD/packages/react-devtools-core)

Updates `react-native` from 0.70.6 to 0.73.4
- [Release notes](https://github.com/facebook/react-native/releases)
- [Changelog](https://github.com/facebook/react-native/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/react-native/commits/v0.73.4/packages/react-native)

---
updated-dependencies:
- dependency-name: react-devtools-core
  dependency-type: indirect
- dependency-name: react-native
  dependency-type: direct:production
...

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