unpkg.com UMD file not found

### What happened?

https://unpkg.com/superdoc@1.43.2/dist/superdoc.umd.js
and
https://unpkg.com/superdoc/dist/superdoc.umd.js

returns:

Not found: /superdoc@1.43.2/dist/superdoc.umd.js

### Context
The URL came from the README. I wanted to test the editor on CodePen. I'm usually using a script tag there.

But it seems that UMD is no longer part of the NPM package.