Upgrade black version (#7089)

stdlib/xmlrpc/server.pyi

@@ -48,6 +48,7 @@ class SimpleXMLRPCDispatcher:  # undocumented
         def register_function(self, function: _DispatchProtocol | None = ..., name: str | None = ...) -> Callable[..., Any]: ...
     else:
         def register_function(self, function: _DispatchProtocol, name: str | None = ...) -> Callable[..., Any]: ...
+
     def register_introspection_functions(self) -> None: ...
     def register_multicall_functions(self) -> None: ...
     def _marshaled_dispatch(