update README.md with JupyterLite site instructions

[Vipul-Cariappa]

Look at jupyter-xeus/xeus#377 (comment)

[martinRenou]

Thanks! @Vipul-Cariappa

It seems you're not getting credits for your changes in Github UI. You are creating your commits with an email address ending with @.com (see https://github.com/jupyterlite/xeus/commit/078cc6f641bb241bc9953fef7b5e5b904af4603a.patch).

It seems it's not a valid email address? This may be fine if you add this address to your Github account https://github.com/settings/emails (no need to verify your email address for Github to consider the commits coming from this address to be yours). Though you may want to fix this in your git config and provide a real address.

[Vipul-Cariappa]

@martinRenou, Thanks for pointing out that my email configured is wrong. I have fixed it using git config --global user.email "[email protected]".
Any commits in the future should work fine.

[Vipul-Cariappa]

Hope the failing test is not my doing?

[martinRenou]

Just a tiny comment, otherwise looks good thanks!

The CI failure seems to be a flaky test, not yours.