Fix broken reference in JSON schema

[jeongukjae]

What does this pull request do?

Fix #291

How did you test this change?

Just fixed a broken reference in the JSON schema.

How did you document this change?

I didn't change the behavior of the library.

Before submitting

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• [x] Read the How to Contribute guide if this is your first contribution.
• [x] Open an issue or discussion topic to discuss this change.
• [x] Write new tests if applicable.
• [x] Update documentation if applicable.

[codesue]

Hi @jeongukjae, thank you for catching this error and contributing a fix! While you're in here, would you please make the same change for the v0.0.1 schema?

[jeongukjae]

@codesue Great. I updated v0.0.1 schema too.