Update React using React.dev Docs

[ryanfitzer]

The React docset has been pulling from the wrong site for 1.5 years. Please update to use https://react.dev/reference/react.

Here is the notice from https://legacy.reactjs.org:

[Kapeli]

The react.dev is very JS-heavy and I've been having trouble getting it to work offline (without a webserver). My plan is to give it one last shot, and if that fails I'll have to make the React docset an online-only one, or include a webserver within Dash.

It's quite an annoying problem and I keep postponing it unfortunately.