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

Bumps [pinia](https://github.com/vuejs/pinia) from 2.2.4 to 2.2.8.
- [Release notes](https://github.com/vuejs/pinia/releases)
- [Commits](https://github.com/vuejs/pinia/compare/pinia@2.2.4...v2.2.8

)

---
updated-dependencies:
- dependency-name: pinia
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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