2D Getting started docs signals page missing step to make Node2D scene main scene

[abrugsch]

Your Godot version: 4.3 stable Issue description: The getting started docs for signals describes adding a new scene for adding a button, and the code for hooking up the signal to an event handler, but as it's a follow on step from the previous page, the Main scene is still set to the sprite2D scene. Therefore when you play the project, the sprite rotates but the button isn't visible.

A paragraph needs adding to switch the main scene from sprite_2D.tscn to node_2D.tscn in the filesystem pane

URL to the documentation page: https://docs.godotengine.org/en/stable/getting_started/step_by_step/signals.html