Outdated procedural geometry, ImmediateMesh tutorial, marked as up to date

[eon-s]

Your Godot version:
4.0 documentation

Issue description:

Procedural geometry, ImmediateMesh tutorial, mentions

Unlike the SurfaceTool or ArrayMesh, ImmediateMesh is an actual node.

But ImmediateMesh is not a node, is a Resource, and the code below refers to a Node too.

PS: I'll add that I haven't done procedural geometry in any version of Godot so I don't know if the rest of Procedural Geometry tutorials are correct but some users reported problems following instructions there, so maybe everything is outdated.

URL to the documentation page:

https://docs.godotengine.org/en/stable/tutorials/3d/procedural_geometry/immediatemesh.html

[trollusk]

+1. Also could whoever updates the page please include an example of making a simple 3D mesh, eg a cube?