mypy fixup

Author: jbrockmendel

pandas/_libs/missing.pyi

@@ -14,4 +14,4 @@ def isneginf_scalar(val: object) -> bool: ...
 def checknull(val: object) -> bool: ...
 def isnaobj(arr: np.ndarray) -> npt.NDArray[np.bool_]: ...
 def is_numeric_na(values: np.ndarray) -> npt.NDArray[np.bool_]: ...
-def is_pdna_or_none(values: npt.ndarray) -> npt.NDArray[np.bool_]: ...
+def is_pdna_or_none(values: np.ndarray) -> npt.NDArray[np.bool_]: ...