The "Try isort now from your browser!" demo page is broken

[ocratravis]

https://pycqa.github.io/isort/docs/quick_start/0.-try.html

In Chrome, the right pane just stays stuck on "Loading..."

Looking in the browser console, I see:

pyodide.js:1 Failed to load resource: net::ERR_NAME_NOT_RESOLVED
interactive.js:26 Uncaught ReferenceError: languagePluginLoader is not defined
at interactive.js:26:1

Looks like DNS can't be found for pyodide-cdn2.iodide.io.

[andersk]

I fixed this in #1991, but the fix has not been deployed to the gh-pages branch (#2039).