Replace broken link in api folder examples.

api/README.md

@@ -5,4 +5,4 @@ OpenAPI/Swagger specs, JSON schema files, protocol definition files.
 Examples:
 
 * https://github.com/kubernetes/kubernetes/tree/master/api
-* https://github.com/openshift/origin/tree/master/api
+* https://github.com/moby/moby/tree/master/api