Minor edit: correction to out of sync link titles in section 4.3 to JSON-LD spec

[richardbergquist]

Minor editorial point. In section 4.3 the note mentions :

The type system for the Verifiable Credentials Data Model is the same as for [JSON-LD] and is detailed in Section 5.4: Specifying the Type and Section 8: JSON-LD Grammar.

It's noted that the section numbers in the links appear to be out of sync with the JSON-LD spec. They should point to :

Section 3.5: Specifying the Type and Section 9: JSON-LD Grammar.

(I have a fork of the repo, with the links corrected. Happy to submit a PR if that helps)

Thanks @richardbergquist