[decorator] Fix FunctionMaker attributes

[donBarbos]

• Closes: Are the type stubs for decorator accurate? #14286
• Source: https://github.com/micheles/decorator/blob/e5cfd35413ea35ae41fde089db86a272ba8b5582/src/decorator.py#L82
• FullArgSpec types:

  typeshed/stdlib/inspect.pyi

  Lines 492 to 499 in cbd732e

  	class FullArgSpec(NamedTuple):
  	args: list[str]
  	varargs: str | None
  	varkw: str | None
  	defaults: tuple[Any, ...] | None
  	kwonlyargs: list[str]
  	kwonlydefaults: dict[str, Any] | None
  	annotations: dict[str, Any]

[github-actions]

According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉