Bump rollup from 3.29.4 to 3.29.5 in /experimental/traffic-portal

Bumps [rollup](https://github.com/rollup/rollup) from 3.29.4 to 3.29.5.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v3.29.4...v3.29.5)

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

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

Author: dependabot[bot]