Wrong naming of the neq operator

[riannella]

The neq operator is named neg in the standard document: https://www.w3.org/ns/odrl.jsonld.
The specification clearly states it should be named neq:

Submitted by @IcarusCoding](https://github.com/IcarusCoding)

[riannella]

@iherman To update https://www.w3.org/ns/odrl.jsonld and change "neg" to "neq"

[iherman]

Done on 2025-04-10.

[riannella]

Summary: Typo fixed in JSON-LD Schema: "neg" to "neq"