[Doc] update PULL_REQUEST_TEMPLATE.md (#3196)

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,39 +1,16 @@
 ### Before submitting a pull request, please make sure the following is done:
 
-### 提交 PR 前请确保完成以下内容:
-
 1. Fork [the repository](https://github.com/youzan/vant) and create your branch from `dev`.
 2. Follow the [contributing guide](./CONTRIBUTING.md) to setup your develop environment.
-2. If you've added code that should be tested, add tests!
+2. If you've added code that should be tested, add tests.
 3. If you've changed APIs, update the documentation.
 4. Ensure the test suite passes (`npm test`).
-5. Make sure your code lints (`npm run lint`).
-6. Describe your pull request.
 
-### 请认真写 PR 的标题，会用于生成 change log。
+#### Title Format
 
-#### 标题规则
-[bug fix / breaking change / new feature] 组件名字：修改内容描述
+[bugfix / new feature / improvement] ComponentName：content
 
-说明：
-* 前面方括号用来区分 Issue / PR 的 类型：bug fix - 改 bug；breaking change: 不兼容的改动；new feature：新功能
-* 修改内容尽可能言简意赅，总结 PR 的改动或者描述 Issue
-* 描述请用中文
-* 组件名字请用英文，首字母大写
-
-示例：
-* [bug fix] Button: 修改颜色
-* [breaking change] Loading: 删除  `static` 属性
-* [new feature] Form: 增加 `FormSelection` 支持
-* [new feature] 新增 Abc 组件
-
-### Please remove the above lines when you submit this pull request, also please fill in the changes you've made in this pull request.
-
-### 提交 PR 前 请把以上内容删除，并填写以下内容。
-
-Fixes #xx(issue number here), remove this line if no related issue.
-
-Changes you made in this pull request:
-
-- some change
-- another change
+Example：
+* [bugfix] Button: color prop not work
+* [new feature] Button: add color prop
+* [improvement] Button: optimize performance