docs(MenuExampleHeaderVertical): fix onClick handler (#3799)

handleItemClick = (e, { name }) => this.setState({ activeItem: name });

Author: Suzi004

docs/src/examples/collections/Menu/Content/MenuExampleHeaderVertical.js

@@ -3,7 +3,7 @@ import { Menu } from 'semantic-ui-react'
 
 export default class MenuExampleHeaderVertical extends Component {
   state = {}
-  handleItemClick = (name) => this.setState({ activeItem: name })
+  handleItemClick = (e, { name }) => this.setState({ activeItem: name });
 
   render() {
     const { activeItem } = this.state