issue: Incorrect Docs

[aronedwards]

Version Number

7.45.0

Codesandbox/Expo snack

n/a

Steps to reproduce

To have an error message for a checkbox, required must be a string with said error
<input {...register('acceptedTermsAndConditions', { required: 'Must be ticked', })} id='accept-terms' type='checkbox' />
Attempts to use return strings from validation fail

Expected behaviour

https://www.react-hook-form.com/api/useform/register/

Docs suggest required must be a boolean, making debugging the issue of a an empty error message very difficult

What browsers are you seeing the problem on?

Chrome

Relevant log output

No response

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