Documentation on SoftBody is incorrect

[suncore]

Your Godot version: 4.0.2 Issue description: When reading https://docs.godotengine.org/en/stable/tutorials/physics/soft_body.html in order to understand how to use SoftBody nodes, there are a few errors in the documentation:

1. The node is called SoftBody3D, not SoftBody. Perhaps replace SoftBody -> SoftBody3D everywhere?
2. Under "Basic set-up" it says: "Create a new scene with a Node3D node as root. Then, create a Softbody node. Add a CubeMesh in the mesh property of the node in the inspector and increase the subdivision of the mesh for simulation." However, there is no CubeMesh available.

URL to the documentation page: https://docs.godotengine.org/en/stable/tutorials/physics/soft_body.html

If you know how to fix the issue you are reporting please consider opening a pull request. We provide a tutorial on using git here: https://docs.godotengine.org/en/stable/community/contributing/pr_workflow.html, writing documentation at https://docs.godotengine.org/en/stable/community/contributing/docs_writing_guidelines.html and contributing to the class reference here: https://docs.godotengine.org/en/stable/community/contributing/updating_the_class_reference.html

[yashmistri]

another issue seems the parameters for SoftBody3D shown in the tutorial are not consistent with what the 4.0 editor shows