Bump rollup in /internal-employee-directory/frontend

Bumps [rollup](https://github.com/rollup/rollup) from 4.9.4 to 4.22.4.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v4.9.4...v4.22.4)

---
updated-dependencies:
- dependency-name: rollup
  dependency-type: indirect
...

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