Bump @prefecthq/prefect-design from 2.7.16 to 2.8.0 in /ui

Bumps [@prefecthq/prefect-design](https://github.com/PrefectHQ/prefect-design) from 2.7.16 to 2.8.0.
- [Release notes](https://github.com/PrefectHQ/prefect-design/releases)
- [Changelog](https://github.com/PrefectHQ/prefect-design/blob/main/CHANGELOG.md)
- [Commits](PrefectHQ/prefect-design@2.7.16...2.8.0)

---
updated-dependencies:
- dependency-name: "@prefecthq/prefect-design"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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