docs(Stepper): fix before-change description (#8937)

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neverland 2021-06-27 15:35:16 +08:00 committed by GitHub
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@ -95,7 +95,7 @@ export default {
### 异步变更
通过 `before-change` 属性可以在
通过 `before-change` 属性可以在输入值变化前进行校验和拦截。
```html
<van-stepper v-model="value" :before-change="beforeChange" />