Fix lint error

Author: kgryte

src/array_api_stubs/_draft/manipulation_functions.py

@@ -119,7 +119,7 @@ def moveaxis(
     x: array,
     source: Union[int, Tuple[int, ...]],
     destination: Union[int, Tuple[int, ...]],
-    /
+    /,
 ) -> array:
     """
     Moves array axes (dimensions) to new positions, while leaving other axes in their original positions.