restrict scikit-learn version

[clonker]

Thanks for submitting a PR, your contribution is really appreciated!

Here's a quick checklist that should be present in PRs:

• [x] Make sure to include one or more tests for your change
• [x] Add yourself to AUTHORS

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 92.16%. Comparing base (a6ac0b9) to head (023a660).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #291 +/- ## ======================================= Coverage 92.16% 92.16% ======================================= Files 142 142 Lines 11652 11652 ======================================= Hits 10739 10739 Misses 913 913 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.