Tween's tween_method has incorrect C# example which causes errors.

[viksl]

Your Godot version:
4.1.1

Issue description:
In the documentation the tween_method has an incorrect example where it uses a lambda method without a parameter which causes an error because the method definition doesn't match what the tween_method expects.

URL to the documentation page:
https://docs.godotengine.org/en/stable/classes/class_tween.html#class-tween-method-tween-method