Several links in the spec lead to W3C DCAT editor's draft instead of the Recommendation

e.g. [DCAT guidelines on versioning](https://w3c.github.io/dxwg/dcat/#version-history) in https://semiceu.github.io/DCAT-AP/releases/3.0.1/#UsageGuidelines but there are 18 references to https://w3c.github.io/dxwg/dcat/ in the source of the spec.