wrong URLs in SustainabilityCriteriaTaxonomy_v0.1.json

Created by: VladimirAlexiev

https://github.com/uncefact/spec-untp/blob/5cde0ee0b28afadbc208f6c30e514aa2666a8db6/website/schema/SustainabilityCriteriaTaxonomy_v0.1.json#L4 This is an incomplete/wrong URL because it lacks protocol. Use "http://vocabulary.uncefact.org/sustainability/", or the sustainability: prefix as defined in the JSONLD context