Enhance _is_pycapsule function to recognize both "PyCapsule" and "capsule" types

Author: kosiew

python/datafusion/user_defined.py

@@ -101,7 +101,10 @@ def __datafusion_scalar_udf__(self) -> object: ...  # noqa: D105
 
 def _is_pycapsule(value: object) -> TypeGuard[_PyCapsule]:
     """Return ``True`` when ``value`` is a CPython ``PyCapsule``."""
-    return value.__class__.__name__ == "PyCapsule"
+
+    type_name = type(value).__name__
+    # CPython exposes capsule objects with the type name "capsule"
+    return type_name in {"PyCapsule", "capsule"}
 
 
 class ScalarUDF: