temp: Downgrade PySide6

Author: AlejandroFernandezLuces

pyproject.toml

@@ -49,7 +49,7 @@ doc = [
     "jupytext==1.16.4",
     "nbsphinx==0.9.5",
     "numpydoc==1.8.0",
-    "pyside6 == 6.8.0,<7",
+    "pyside6 == 6.1.0,<7",
     "pyvistaqt == 0.11.1,<1",
     "sphinx==8.1.3",
     "sphinx-autoapi==3.3.3",