Fix ws extension CDN URL and hash in example

[mschoettle]

Description

I used <script> tags from the example on the WS extension page (https://htmx.org/extensions/ws/#installing) and first got an invalid computed hash error, once that was fixed, there was an error about import statements (because the default file delivered is based on ws.esm.js).

I switched to ws.min.js, latest version and updated the computed hash.

Corresponding issue:

Testing

n/a

Checklist

• I have read the contribution guidelines
• I have targeted this PR against the correct branch (master for website changes, dev for
  source changes)
• This is either a bugfix, a documentation update, or a new feature that has been explicitly
  approved via an issue
• I ran the test suite locally (npm run test) and verified that it succeeded