Update CasC documentation

[fcojfernandez]

fixes: #416

After #399 the jcasc documentation is outdated.

Testing done

Submitter checklist

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests - that demonstrates feature works or fixes the issue

[jtnord]

there is some outdated references in lines 24-64 still

[fcojfernandez]

misleading comment and misleading issue then. I'll take a look when I manage some time