Bump @nextcloud/vue from 3.8.0 to 3.9.0

Bumps [@nextcloud/vue](https://github.com/nextcloud/nextcloud-vue) from 3.8.0 to 3.9.0.
- [Release notes](https://github.com/nextcloud/nextcloud-vue/releases)
- [Changelog](https://github.com/nextcloud/nextcloud-vue/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nextcloud/nextcloud-vue/compare/v3.8.0...v3.9.0

)

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