Menu: fix docs

Author: jikkai

examples/docs/en-US/menu.md

@@ -306,7 +306,7 @@ Vertical NavMenu could be collapsed.
 | default-active | index of currently active menu | string    | — | — |
 | default-openeds | array that contains indexes of currently active sub-menus  | Array    | — | — |
 | unique-opened  |  whether only one sub-menu can be active  | boolean   | — | false   |
-| menu-trigger | how sub-menus are triggered, only works when `mode` is 'horizontal' | string    | — | hover |
+| menu-trigger | how sub-menus are triggered, only works when `mode` is 'horizontal' | string    | hover / click | hover |
 | router  | whether `vue-router` mode is activated. If true, index will be used as 'path' to activate the route action | boolean   | — | false   |
 | collapse-transition  | whether to enable the collapse transition | boolean   | — | true   |
 

examples/docs/es/menu.md

@@ -308,7 +308,7 @@ NavMenu vertical puede ser colapsado.
 | default-active    | índice del menu-item activo              | string  | —                     | —           |
 | default-openeds   | arreglo que contiene las llaves del sub-menus activo | Array   | —                     | —           |
 | unique-opened     | si solo un submenu puede ser activo      | boolean | —                     | false       |
-| menu-trigger      | como dispara eventos sub-menus, solo funciona cuando `mode` es 'horizontal' | string  | —                     | hover       |
+| menu-trigger      | como dispara eventos sub-menus, solo funciona cuando `mode` es 'horizontal' | string  | hover / click      | hover   |
 | router            | si el modo `vue-router` está activado. Si es verdader, índice será usado como 'path' para activar la ruta | boolean | —                     | false       |
 | collapse-transition  | si se debe permitir collapse transition | boolean   | — | true   |
 

examples/docs/zh-CN/menu.md

@@ -307,7 +307,7 @@
 | default-active | 当前激活菜单的 index | string    | — | — |
 | default-openeds | 当前打开的 sub-menu 的 index 的数组 | Array    | — | — |
 | unique-opened  | 是否只保持一个子菜单的展开 | boolean   | — | false   |
-| menu-trigger  | 子菜单打开的触发方式(只在 mode 为 horizontal 时有效) | string   | — | hover   |
+| menu-trigger  | 子菜单打开的触发方式(只在 mode 为 horizontal 时有效) | string   | hover / click | hover |
 | router  | 是否使用 vue-router 的模式，启用该模式会在激活导航时以 index 作为 path 进行路由跳转 | boolean   | — | false   |
 | collapse-transition  | 是否开启折叠动画 | boolean   | — | true   |