Code links in documentation sometimes go to documentation for a distant parent class

[Tobychev]

Describe the bug
In the IO tutorial the code example contains links that all go to the traitlets documentation instead of the ctapipe pages of the class.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://ctapipe.readthedocs.io/en/latest/auto_examples/tutorials/tableloader_and_eventsources.html#eventsource-s
2. Click on EventSource

Expected behavior
Link should go to https://ctapipe.readthedocs.io/en/latest/api/ctapipe.io.EventSource.html