ReadMe example links to an outdated (alpha) version on codesandbox

[jay-jlm]

This page links to a codesandbox example that uses an outdated alpha version of the library:
https://github.com/final-form/react-final-form-hooks#simple-example

It took me a while to find out why some editions I made in that code did not work.
Turns out just switching to a more up-to-date of the library fixed the errors for me.