[py] Ruff auto-fixes.

.pre-commit-config.yaml

MaterialLib/SolidModels/MFront/ModCamClay_ShearTest.py

...Data/HydroMechanics/SeabedResponse/Stationary_waves.ipynb

Tests/Data/Mechanics/Linear/PythonHertzContact/post.py

...gating_jupyter_notebook/Kregime_Propagating_jupyter.ipynb

...eld/kregime_jupyter_notebook/Kregime_Static_jupyter.ipynb

...PhaseField/surfing_jupyter_notebook/surfing_pyvista.ipynb