message: docs(Field): optimize docs
diff: @@ -198,8 +198,8 @@ Use `input-align` prop to align the input value
  ```html
  <van-field
  v-model="value"
  - :label="Text"
  - :placeholder="Input Align Right"
  + label="Text"
  + placeholder="Input Align Right"
  input-align="right"
  />
  ```
  