Chore(deps): Bump @nextcloud/files from 3.8.0 to 3.9.0

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

---
updated-dependencies:
- dependency-name: "@nextcloud/files"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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