Update openapi json schema generator to list kotlin validation and generation

[spacether]

What kind of change does this PR introduce?

This updated the implementation for the openapi-json-schema-generator project
It adds Kotlin validation + code generation
Kotlin validation/generation was introduced here: https://github.com/openapi-json-schema-tools/openapi-json-schema-generator

Issue Number:

• Closes #___
• Related to #___
• Others?

Screenshots/videos:

If relevant, did you update the documentation?

Summary

Does this PR introduce a breaking change?
No

[github-actions]

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[benjagm]

Thanks a lot taking care of updating the details of your tooling Justin!