Bump react-devtools-core from 4.27.1 to 4.28.5 in /example (#548)

Bumps [react-devtools-core](https://github.com/facebook/react/tree/HEAD/packages/react-devtools-core) from 4.27.1 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)

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

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