message: fix(docs): add note to PinInputField
diff: @@ -31,7 +31,8 @@ import { PinInput, PinInputField } from "@chakra-ui/core"
  ```
  - **PinInput:** The component that provides context to all the pin-input fields
  -- **PinInputField:** The text field that user types in
  +- **PinInputField:** The text field that user types in - must be a direct child
  + of `PinInput`
  ## Usage
  