chore(deps): bump libresign/nextcloud-behat in /tests/integration

Bumps [libresign/nextcloud-behat](https://github.com/LibreSign/nextcloud-behat) from 1.5.1 to 1.6.0.
- [Release notes](https://github.com/LibreSign/nextcloud-behat/releases)
- [Commits](LibreSign/nextcloud-behat@v1.5.1...v1.6.0)

---
updated-dependencies:
- dependency-name: libresign/nextcloud-behat
  dependency-version: 1.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]