media type should be more specific: application/ld+json; profile="http://mlcommons.org/croissant/1.0"

[pdurbin]

As discussed during a Croissant Task Force meeting last week that included a presentation by @stain on Signposting, the media type for this Croissant exporter should be made more specific so that clients can disambiguate between various JSON-LD formats.

From that meeting, here is the recommended media type for Croissant:

application/ld+json; profile="http://mlcommons.org/croissant/1.0"

I have requested that this be added to the Croissant spec in this issue:

• media type / content type / MIME type for Croissant (JSON-LD "profile" parameter) mlcommons/croissant#792

[pdurbin]

It has been added to the spec, via this PR I made that was just merged:

• state media type for Croissant (includes profile) mlcommons/croissant#801