Merge pull request #4044 from benjagm/curate-json-schema

Add the details of the JSON Schema repository to "json-schema" topic

Author: ahpook

topics/json-schema/index.md

@@ -8,6 +8,7 @@ short_description: JSON Schema is a vocabulary that allows you to validate, anno
   documents.
 topic: json-schema
 url: https://json-schema.org/
-related: json
+github_url: https://github.com/json-schema-org
+related: json, api
 ---
 While JSON is probably the most popular format for exchanging data, **JSON Schema** is the vocabulary that enables JSON data consistency, validity, and interoperability at scale.