TYP,STY: Use PEP 570 for denoting the from_dlpack's positional-only parameter

Author: BvB93

numpy/__init__.pyi

@@ -4368,4 +4368,4 @@ class chararray(ndarray[_ShapeType, _CharDType]):
 class _SupportsDLPack(Protocol[_T_contra]):
     def __dlpack__(self, *, stream: None | _T_contra = ...) -> _PyCapsule: ...
 
-def from_dlpack(__obj: _SupportsDLPack[None]) -> NDArray[Any]: ...
+def from_dlpack(obj: _SupportsDLPack[None], /) -> NDArray[Any]: ...