Set literals have extra quotes

[JonathanPlasse]

Expected behavior

Set literals should not have extra quotes.

Description about the bug

Instead of this

def fbx(
    object_types: typing.Any | None = {
        '"CAMERA"',
        '"EMPTY"',
        '"MESH"',
        '"ARMATURE"',
        '"OTHER"',
        '"LIGHT"',
    }

It should be this

def fbx(
    object_types: typing.Any | None = {
        "CAMERA",
        "EMPTY",
        "MESH",
        "ARMATURE",
        "OTHER",
        "LIGHT",
    }

• I found this when encountering Set literals are unsorted in parameter default value #209