query-node: set attribution field when provided

query-node/mappings/content-directory/entity/update.ts

@@ -98,6 +98,8 @@ async function updateLicenseEntityPropertyValues(
     // Set the license type
     record.type = u
   }
+
+  record.attribution = props.attribution || record.attribution
   await db.save<LicenseEntity>(record)
 }