Add another missing key

Author: M-i-k-e-l

uilib-docs/src/templates/component.js

@@ -102,7 +102,7 @@ export default class ComponentTemplate extends Component {
 
           <ul>
             {_.map(extendLinks, link => (
-              <li className="link">{link}</li>
+              <li className="link" key={link}>{link}</li>
             ))}
           </ul>