Fix quickstart tutorial when running via `pip install learnosity-sdk[quickstart]`

[ferdia-sopermaccafraidh-lrn]

This resolves the issue when running the quickstart guide when installinga as a library from the documentation.

pip install learnosity-sdk[quickstart]

Working now shown below locally in a fresh venv and install from the locally created wheels.

Checklist

• [ ] Feature

• [x] Bug

• [ ] Security

• [ ] Documentation

• [ ] ChangeLog.md updated

• [ ] Tests added

• [ ] All testsuites passed

• [ ] make dist completed successfully

[ferdia-sopermaccafraidh-lrn]

@walsh-conor this is my first PR after joining the company, so I could be missing something. If you have a moment to review I would appreciate it! 😄

Please review with caution though due to my new status! 😅