Focus state is not visible for recaptcha in forced colors mode

[dominoweir]

react-google-recaptcha version: 3.1.0
react-async-script version: unclear, I don't see it in our lockfile as a dep

The focus state for the recaptcha checkbox is not visible in forced colors mode.

To reproduce:

Turn on forced colors mode in Chrome (see this link for instructions)
Navigate to a page that contains an instance of the component
Use your keyboard to navigate to the checkbox and note that it does not have a visible focus state