Capitalization of "GLTF" and "glTF" is not standardized across class reference and manual.

[tetrapod00]

Your Godot version:
4.3
Issue description:
The docs have no standardization of capitalization for the glTF format (and meshes or files of that format). Both "GLTF" and "glTF" appear throughout the manual and class reference. This page even uses both.

Official usage from the glTF specs page:

• "glTF" for the format.
• "GLB" for a binary file.
• ".gltf" for the format extension.

Godot classes use all-caps GTLF, as in GLTFAccessor. This makes sense for class naming rules. All other uses should ideally be standardized to the official style of "glTF".

Standardizing this would involve a lot of churn in the class reference, so perhaps this should be a style guideline that is applied whenever a file is already being changed.

URL to the documentation page (if already existing):
https://docs.godotengine.org/en/4.3/classes/class_gltfaccessor.html
https://docs.godotengine.org/en/latest/classes/class_gltfstate.html
https://docs.godotengine.org/en/latest/search.html?q=gltf

[skyace65]

Once the class reference PR is merged this can be closed.