Add networknt/json-schema-validator to validator-libraries-modern.yml

[JLLeitschuh]

No description provided.

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[jogu]

networknt's library is already listed, so accepting this PR would result in it being listed twice:

json-schema-org.github.io/_data/validator-libraries-modern.yml

Line 131 in e65e5fb

- name: networknt/json-schema-validator

(The existing entry does appear to be erroneously empty in the 'date-draft' key though.)

[JLLeitschuh]

😆 I really don't know how I missed it. But you are indeed correct!

[Relequestual]

I noticed this change updated the supported versions of JSON Schema, so I've removed the duplicate and simply updated support.

[Relequestual]

Thanks for your contribution!

[JLLeitschuh]

Thank you for cleaning up my contribution. Much appreciated!