Fix react className warning

src/routes/Dashboard/Analysis.js

@@ -318,7 +318,7 @@ export default class Analysis extends Component {
                         {
                           rankingListData.map((item, i) => (
                             <li key={item.title}>
-                              <span className={(i < 3) && styles.active}>{i + 1}</span>
+                              <span className={(i < 3) ? styles.active : ''}>{i + 1}</span>
                               <span>{item.title}</span>
                               <span>{numeral(item.total).format('0,0')}</span>
                             </li>