Your Godot version: 4.5

Issue description: The fact that you can have uniforms of array types isn't obvious. It is mentioned briefly under 'Arrays' but not under data types or uniforms. I suggest a short note be added to both, or at least under the 'Uniforms' heading. I didn't notice it for months..

If I can find time I will see if I can contribute a PR.

URL to the documentation page (if already existing): https://docs.godotengine.org/en/stable/tutorials/shaders/shader_reference/shading_language.html