Upgrade black version (#7089)

stdlib/@python2/os/__init__.pyi

@@ -235,6 +235,7 @@ if sys.platform != "win32":
     def fchown(fd: int, uid: int, gid: int) -> None: ...
     if sys.platform != "darwin":
         def fdatasync(fd: FileDescriptorLike) -> None: ...  # Unix only, not Mac
+
     def fpathconf(fd: int, name: str | int) -> int: ...
     def fstatvfs(fd: int) -> _StatVFS: ...
     def ftruncate(fd: int, length: int) -> None: ...