Your Godot version: 4.1

Issue description:
The documentation page about StateMachine has a screenshot and description for the AnimationNodeStateMachineTransition that seems outdated. This is what I see:

The description is notably missing the new "Expression" area. The relative important documentation is present in the Advance Expression Base Node and in Evaluating Expressions, so at least giving the appropriate links in here would be useful. That could also go together with a note for C# users to use GDScript method names (which is pretty obvious, but nonetheless something to remind).

Another thing that seems missing is about Advance Condition (now just "Condition"): there's a note "more on this later" that doesn't seem to appear anywhere.

URL to the documentation page
https://docs.godotengine.org/en/stable/tutorials/animation/animation_tree.html#statemachine