Bump @nextcloud/axios from 1.5.0 to 1.6.0

Bumps [@nextcloud/axios](https://github.com/nextcloud/nextcloud-axios) from 1.5.0 to 1.6.0.
- [Release notes](https://github.com/nextcloud/nextcloud-axios/releases)
- [Changelog](https://github.com/nextcloud/nextcloud-axios/blob/master/CHANGELOG.md)
- [Commits](nextcloud-libraries/nextcloud-axios@v1.5.0...v1.6.0)

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