docs: fix docs' format

components/menu/demo/sider-current.md

 ---
 order: 2
 title:
-  zh−CN: 只展开当前父级菜单
-  en-US: only to open the current parant menu
+    zh-CN: 只展开当前父级菜单
+    en-US: Only to open the current parant menu
 ---
 
 ## zh-CN

components/menu/demo/vertical.md

@@ -5,11 +5,11 @@ title:
   en-US: Vertical menu
 ---
 
-## zh-CN:
+## zh-CN
 
 子菜单是弹出的形式。
 
-## en-US:
+## en-US
 
 Submenus open as pop-ups.
 

components/menu/index.en-US.md

 ---
 category: Components
-chinese: 导航菜单
 cols: 1
 type: Navigation
-english: Menu
+title: Menu
 ---
 
 Menu list of Navigation.

components/menu/index.zh-CN.md

 ---
 category: Components
-chinese: 导航菜单
 cols: 1
 type: Navigation
-english: Menu
+title: Menu
+subtitle: 导航菜单
 ---
 
 为页面和功能提供导航的菜单列表。

components/popconfirm/index.en-US.md

 ---
 category: Components
-chinese: 气泡确认框
 type: Views
-english: Popconfirm
+title: Popconfirm
 ---
 
 A simple and compact confirmation dialog of an action.

components/popover/index.en-US.md

 ---
 category: Components
-chinese: 气泡卡片
 type: Views
 english: Popover
 ---
@@ -9,7 +8,7 @@ The floating card popped by clicking or hovering.
 
 ## When to use
 
-A simple and pop-up menu to provide more information and operations of an action.
+A simple popup menu to provide extra information or operations.
 
 Comparing with `Tooltip`, besides information `Popover` card can also provide action elements like links and buttons.