chore(deps-dev): bump rollup

Bumps the dev-dependencies group with 1 update in the /reference-lib directory: [rollup](https://github.com/rollup/rollup).


Updates `rollup` from 4.27.2 to 4.28.1
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v4.27.2...v4.28.1)

---
updated-dependencies:
- dependency-name: rollup
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]