Fix typo

[changeworld]

Json -> JSON

[prmerger-automator]

@changeworld : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit 59ad218:

✅ Validation status: passed

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articles/machine-learning/reference-automl-images-schema.md	✅Succeeded

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[Court72]

@ssalgadodev

Can you review the proposed changes?

Important: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
@MicrosoftDocs/public-repo-pr-review-team

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Resolve Merge Conflict

[v-dirichards]

@ssalgadodev Could you review this proposed update to your article and enter #sign-off in a comment if it's ready to merge? Thanks!