build(deps-dev): bump prettier in /serverpackcreator-web-frontend

Bumps [prettier](https://github.com/prettier/prettier) from 3.6.2 to 3.8.1.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md)
- [Commits](https://github.com/prettier/prettier/compare/3.6.2...3.8.1

)

---
updated-dependencies:
- dependency-name: prettier
  dependency-version: 3.8.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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