Fix: functools.reduce does not accept keyword arguments (#11090)

Author: rayansostenes

stdlib/functools.pyi

@@ -36,9 +36,9 @@ _PWrapper = ParamSpec("_PWrapper")
 _RWrapper = TypeVar("_RWrapper")
 
 @overload
-def reduce(function: Callable[[_T, _S], _T], sequence: Iterable[_S], initial: _T) -> _T: ...
+def reduce(__function: Callable[[_T, _S], _T], __sequence: Iterable[_S], __initial: _T) -> _T: ...
 @overload
-def reduce(function: Callable[[_T, _T], _T], sequence: Iterable[_T]) -> _T: ...
+def reduce(__function: Callable[[_T, _T], _T], __sequence: Iterable[_T]) -> _T: ...
 
 class _CacheInfo(NamedTuple):
     hits: int