fix typo in controller.mdx (#1016)

Author: 38elements

src/content/docs/usecontroller/controller.mdx

@@ -32,7 +32,7 @@ The following table contains information about properties which `Controller` pro
 
 | Object Name                            | Name                 | Type                                        | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
 | -------------------------------------- | -------------------- | ------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| `field`                                | `onChange`           | <TypeText>`(value: any) => void`</TypeText> | A function which sends the input's value to the library.<br/><br/>_ It should be assigned to the `onChange` prop of the input and value should **not be `undefined`**.<br/>_ This prop update [formState](/docs/useform/formstate) and you should avoid manually invoke [setValue](/docs/useform/setvalue) or other API related to field update.                                                                                                                                                                                                               |
+| `field`                                | `onChange`           | <TypeText>`(value: any) => void`</TypeText> | A function which sends the input's value to the library.<br/><br/> _It should be assigned to the `onChange` prop of the input and value should **not be `undefined`**._ <br/>This prop update [formState](/docs/useform/formstate) and you should avoid manually invoke [setValue](/docs/useform/setvalue) or other API related to field update.                                                                                                                                                                                                               |
 | `field`                                | `onBlur`             | <TypeText>`() => void`</TypeText>           | A function which sends the input's onBlur event to the library. It should be assigned to the input's `onBlur` prop.                                                                                                                                                                                                                                                                                                                                                                                                                                            |
 | `field`                                | `value`              | <TypeText>unknown</TypeText>                | The current value of the controlled component.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
 | `field`                                | `disabled`              | <TypeText>boolean</TypeText>                | The disabled state of the input.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |