Bump rollup from 2.78.0 to 2.80.0 in /mcf-browser

Bumps [rollup](https://github.com/rollup/rollup) from 2.78.0 to 2.80.0.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/v2.80.0/CHANGELOG.md)
- [Commits](rollup/rollup@v2.78.0...v2.80.0)

---
updated-dependencies:
- dependency-name: rollup
  dependency-version: 2.80.0
  dependency-type: indirect
...

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

Author: dependabot[bot]