fix schema.yaml

[nsano-rururu]

iris_url to iris_host

Description

Checklist

• [x] I have reviewed the contributing guidelines.
• [ ] I have included unit tests for my changes or additions.
• [ ] I have successfully run make test-docker with my changes.
• [ ] I have manually tested all relevant modes of the change in this PR.
• [ ] I have updated the documentation.
• [x] I have updated the changelog.

Questions or Comments

[jertel]

Good find. @malinkinsa FYI.