Bump react-router from 7.9.3 to 7.12.0

Bumps [react-router](https://github.com/remix-run/react-router/tree/HEAD/packages/react-router) from 7.9.3 to 7.12.0.
- [Release notes](https://github.com/remix-run/react-router/releases)
- [Changelog](https://github.com/remix-run/react-router/blob/main/packages/react-router/CHANGELOG.md)
- [Commits](https://github.com/remix-run/react-router/commits/react-router@7.12.0/packages/react-router)

---
updated-dependencies:
- dependency-name: react-router
  dependency-version: 7.12.0
  dependency-type: direct:development
...

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Author: dependabot[bot]