Fix usage of PropTypes.oneOfType

app/javascript/react/screens/App/Overview/components/Migrations/ScheduledTimeInfoItem.js

@@ -22,7 +22,7 @@ ScheduledTimeInfoItem.propTypes = {
   planId: PropTypes.string,
   migrationStarting: PropTypes.bool,
   showScheduledTime: PropTypes.bool,
-  migrationScheduled: PropTypes.oneOfType(PropTypes.number, PropTypes.string)
+  migrationScheduled: PropTypes.oneOfType([PropTypes.number, PropTypes.string])
 };
 
 export default ScheduledTimeInfoItem;