YAML JSON Schema is not enough for roundtrip-safe

[ioggstream]

I suggest

• OAS 3.1 can reference https://www.ietf.org/archive/id/draft-ietf-httpapi-yaml-mediatypes-01.html#name-yaml-and-json once it's released

Because

• The "YAML JSON Schema" has some issues with inf/nan that do not map to JSON datatypes.
• DRY

cc: @darrelmiller https://github.com/ietf-wg-httpapi/mediatypes/issues/8#issuecomment-1073116351

[darrelmiller]

@webron Can you get an authoritative opinion on this?