build(deps): bump react from 19.2.3 to 19.2.8 in /frontend

Bumps [react](https://github.com/react/react/tree/HEAD/packages/react) from 19.2.3 to 19.2.8.
- [Release notes](https://github.com/react/react/releases)
- [Changelog](https://github.com/react/react/blob/main/CHANGELOG.md)
- [Commits](https://github.com/react/react/commits/v19.2.8/packages/react)

---
updated-dependencies:
- dependency-name: react
  dependency-version: 19.2.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]