Bump @nextcloud/dialogs from 2.0.1 to 3.1.1

Bumps [@nextcloud/dialogs](https://github.com/nextcloud/nextcloud-dialogs) from 2.0.1 to 3.1.1.
- [Release notes](https://github.com/nextcloud/nextcloud-dialogs/releases)
- [Changelog](https://github.com/nextcloud/nextcloud-dialogs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nextcloud/nextcloud-dialogs/compare/v2.0.1...v3.1.1

)

Signed-off-by: dependabot[bot] <support@github.com>
Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>