fixed response in context api

apps/dnet-exporter-api/src/main/java/eu/dnetlib/openaire/context/ContextApiController.java

@@ -88,7 +88,7 @@ public class ContextApiController extends AbstractDnetController {
 					if (parts.length < 3) { throw new RuntimeException("Invalid conceptId (It should have 3 (or more) parts): " + sc.getSubCommunityId()); }
 					final CategorySummary cat = new CategorySummary();
 					cat.setId(parts[0] + "::" + parts[1]);
-					cat.setLabel(sc.getLabel());
+					cat.setLabel(sc.getCategory());
 					cat.setHasConcept(true);
 					return cat;
 				})