[DOC] Add reference to paper to FreshPRINCEClassifier

[TonyBagnall]

Describe the issue linked to the documentation

FreshPRINCEClassifier does not reference the paper in the documentation
https://link.springer.com/chapter/10.1007/978-3-031-09282-4_13
and it should do so

Suggest a potential alternative/fix

No response

[jasonmokk]

Hello, I'd like to work on this issue.