Add Ontology Engineering Curriculum

[fabio-rovai]

Adds one link to Educational.

- [Ontology Engineering Curriculum](https://github.com/fabio-rovai/ontology-curriculum) - A free 147-lesson curriculum published as OWL 2 and SKOS, where every lesson is crosswalked to the standard it teaches and a SHACL release gate runs in CI.

I am the author.

Why it belongs in Educational. The section carries OBO Academy and the Coursera Web of Data course. This is the same category and a larger one: 9 courses, 147 lessons, free, no payment step.

What it adds that nothing else in the section does. The curriculum is itself published as an ontology, so the syllabus is queryable rather than only readable. Each lesson node carries cur:teaches pointing at the normative IRI of the standard it covers, across RDF, RDFS, OWL 2, SKOS, SHACL, SPARQL, PROV-O and SSSOM. "Which lessons cover SHACL" is a SPARQL query.

The crosswalk is regex over lesson titles, documented in rdfs:comment on the property with the patterns in crosswalk.json, so the derivation is auditable rather than asserted.

validate.py runs the SHACL shapes and then a closed-world check SHACL cannot do: every object of cur:teaches must be a declared cur:Standard, so a typo cannot ship as a term denoting nothing. It runs in GitHub Actions on every push and it caught a real defect on its first run, recorded in the README.

Against your quality standards: documented, tested in CI, actively maintained, CC-BY-4.0.