fix test

Author: hauntsaninja

test-data/unit/check-varargs.test

@@ -631,7 +631,7 @@ T = TypeVar('T')
 def f(*args: T) -> T: ...
 reveal_type(f(*(1, None)))  # N: Revealed type is "Union[Literal[1]?, None]"
 reveal_type(f(1, *(None, 1)))  # N: Revealed type is "Union[Literal[1]?, None]"
-reveal_type(f(1, *(1, None)))  # N: Revealed type is "Union[builtins.int, None]"
+reveal_type(f(1, *(1, None)))  # N: Revealed type is "Union[Literal[1]?, None]"
 [builtins fixtures/tuple.pyi]