Replace `@types/rdf-js` with `@rdfjs/types`

[jeswr]

Usage of @types/rdf-js should be @rdfjs/types instead. See https://github.com/rdfjs/types?tab=readme-ov-file#what-about-typesrdf-js

This was discovered in the same way as quadstorejs/quadstore#167 (comment).

[NoelDeMartin]

Hey, thanks for opening the issue here and elsewhere. I'll update it when I do the next release.