Bump react-router

Bumps the npm_and_yarn group with 1 update in the /jbrowse directory: [react-router](https://github.com/remix-run/react-router/tree/HEAD/packages/react-router).


Updates `react-router` from 6.30.3 to 6.30.4
- [Release notes](https://github.com/remix-run/react-router/releases)
- [Changelog](https://github.com/remix-run/react-router/blob/react-router@6.30.4/packages/react-router/CHANGELOG.md)
- [Commits](https://github.com/remix-run/react-router/commits/react-router@6.30.4/packages/react-router)

---
updated-dependencies:
- dependency-name: react-router
  dependency-version: 6.30.4
  dependency-type: indirect
  dependency-group: npm_and_yarn
...

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Author: dependabot[bot]