Upgrade black version (#7089)

stdlib/_winapi.pyi

@@ -160,6 +160,7 @@ if sys.platform == "win32":
     if sys.version_info >= (3, 7):
         def GetACP() -> int: ...
         def GetFileType(handle: int) -> int: ...
+
     def GetCurrentProcess() -> int: ...
     def GetExitCodeProcess(__process: int) -> int: ...
     def GetLastError() -> int: ...