Tooltip: add tips to docs, fixed #3894 (#3906)

examples/docs/en-US/tooltip.md

@@ -192,6 +192,8 @@ In fact, Tooltip is an extension based on [Vue-popper](https://github.com/elemen
 
 :::tip
 The `router-link` component is not supported in tooltip, please use `vm.$router.push`.
+
+Disabled form elements are not supported in tooltip, see more information at [MDN](https://developer.mozilla.org/en-US/docs/Web/Events/mouseenter), please wrap disabled form elements.
 :::
 
 

examples/docs/zh-CN/tooltip.md

@@ -195,6 +195,8 @@ Tooltip 组件提供了两个不同的主题：`dark`和`light`。
 
 :::tip
 tooltip 内不支持 `router-link` 组件，请使用 `vm.$router.push` 代替。
+
+tooltip 内不支持 disabled form 元素，参考[MDN](https://developer.mozilla.org/en-US/docs/Web/Events/mouseenter)，请在 disabled form 元素外层添加一层包裹元素。
 :::
 
 ### Attributes