Upgrade black version (#7089)

stdlib/nis.pyi

@@ -5,4 +5,5 @@ if sys.platform != "win32":
     def get_default_domain() -> str: ...
     def maps(domain: str = ...) -> list[str]: ...
     def match(key: str, map: str, domain: str = ...) -> str: ...
+
     class error(Exception): ...