Fix typo in docstring in modeling_sam3_tracker.py (#42438)
* Update modeling_sam3_tracker.py
* Apply docstring to modular_sam3_tracker.py for consistency
Added custom introduction to auto_docstring for Sam3TrackerPreTrainedModel. to match typo fix in modeling_sam3_tracker.py
* Fix SAM3 tracker docstrings in modular and regenerate modeling
