[Doc] props title

packages/search/en-US.md

@@ -56,7 +56,7 @@ Use `action` slot to custom right button, `cancel` event will no longer be trigg
 </van-search>
 ```
 
-### API
+### Props
 
 Search support all native properties of input tag，such as `maxlength`、`placeholder`、`autofocus`
 
@@ -71,7 +71,7 @@ Search support all native properties of input tag，such as `maxlength`、`place
 | error | Whether to show error info | `Boolean` | `false` |
 | input-align | Input text align, can be set to `center` `right` | `String` | `left` |
 
-### Event
+### Events
 
 Search support all native events of input tag，such as `focus`、`blur`、`keypress`
 
@@ -81,7 +81,7 @@ Search support all native events of input tag，such as `focus`、`blur`、`keyp
 | search | Triggered when confirm search | - |
 | clear | Triggered when click clear icon | - |
 
-### Slot
+### Slots
 
 | Name | Description |
 |------|------|

packages/search/zh-CN.md

@@ -48,7 +48,7 @@ Tips: 在 `van-search` 外层增加 form 标签，并且 action 不为空，即
 </van-search>
 ```
 
-### API
+### Props
 
 Search 默认支持 Input 标签所有的原生属性，比如 `maxlength`、`placeholder`、`autofocus` 等
 
@@ -63,7 +63,7 @@ Search 默认支持 Input 标签所有的原生属性，比如 `maxlength`、`pl
 | error | 是否将输入内容标红 | `Boolean` | `false` | - |
 | input-align | 输入框内容对齐方式，可选值为 `center` `right` | `String` | `left` | - |
 
-### Event
+### Events
 
 Search 默认支持 Input 标签所有的原生事件，如 `focus`、`blur`、`keypress` 等
 
@@ -73,7 +73,7 @@ Search 默认支持 Input 标签所有的原生事件，如 `focus`、`blur`、`
 | search | 确定搜索 | - |
 | clear | 点击清除按钮后触发 | - |
 
-### Slot
+### Slots
 
 | 名称 | 说明 |
 |------|------|