chore(deps): bump express in /packages/react/examples/react-router (#21105)

Bumps [express](https://github.com/expressjs/express) from 4.21.0 to 4.22.1.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/v4.22.1/History.md)
- [Commits](expressjs/express@4.21.0...v4.22.1)

---
updated-dependencies:
- dependency-name: express
  dependency-version: 4.22.1
  dependency-type: indirect
...

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Author: dependabot[bot]