Inconsistent usage of source_color with hint_depth_texture

[tetrapod00]

Your Godot version:
4.4
Issue description:
https://docs.godotengine.org/en/latest/tutorials/shaders/advanced_postprocessing.html#depth-texture uses source_color when accessing hint_depth_texture.
https://docs.godotengine.org/en/latest/tutorials/shaders/screen-reading_shaders.html#depth-texture does not use source_color when accessing hint_depth_texture.
Only one of these should be right (in the renderers where source_color matters).

There may also be other usages, and we should also check and make sure that hint_screen_texture and hint_normal_roughness_texture usages are consistent in other pages, too.

URL to the documentation page:
See above

[clayjohn]

That must be a copy-paste typo. I don't think source_color is a valid hint for the depth texture