fix snapshot ci

components/menu/demo/theme.md

@@ -58,7 +58,7 @@ class Sider extends React.Component {
             <Menu.Item key="3">Option 3</Menu.Item>
             <Menu.Item key="4">Option 4</Menu.Item>
           </SubMenu>
-          <SubMenu disabled key="sub2" title={<span><Icon type="appstore" /><span>Navigtion Two</span></span>}>
+          <SubMenu key="sub2" title={<span><Icon type="appstore" /><span>Navigtion Two</span></span>}>
             <Menu.Item key="5">Option 5</Menu.Item>
             <Menu.Item key="6">Option 6</Menu.Item>
             <SubMenu key="sub3" title="Submenu">