### Godot version

0810ecaafdbee3ea747219e6ab3a8de5d2216a09

### System information

Windows 11, Nvidia 3000, firefox

### Issue description

Exporting the gltf file is corrupt in blender.

### Steps to reproduce

1. Open project.
2. Export as glb
3. Open in blender
4. Blender display many warnings

![image](https://user-images.githubusercontent.com/32321/216740742-de662c5c-f5c3-44b5-a36e-8ad33defdbba.png)


### Minimal reproduction project

https://cdn.discordapp.com/attachments/598003845657788438/1071249610896580691/Test_Game_Project.zip


ERR_FAIL_NULL_V(p_state, ERR_PARSE_ERROR);
	if (p_state->json.has("extensionsUsed")) {
		Vector<String> ext_array = p_state->json["extensionsUsed"];
		p_state->extensions_used = ext_array;
	}
	if (p_state->json.has("extensionsRequired")) {
		Vector<String> ext_array = p_state->json["extensionsRequired"];
		p_state->extensions_required = ext_array;
	}
	HashSet<String> supported_extensions;
	supported_extensions.insert("KHR_lights_punctual");
	supported_extensions.insert("KHR_materials_pbrSpecularGlossiness");
	supported_extensions.insert("KHR_texture_transform");
	for (Ref<GLTFDocumentExtension> ext : document_extensions) {
		ERR_CONTINUE(ext.is_null());
		Vector<String> ext_supported_extensions = ext->get_supported_extensions();
		for (int i = 0; i < ext_supported_extensions.size(); ++i) {
			supported_extensions.insert(ext_supported_extensions[i]);
		}
	}
	Error ret = Error::OK;
	for (int i = 0; i < p_state->extensions_required.size(); i++) {
		if (!supported_extensions.has(p_state->extensions_required[i])) {
			ERR_PRINT("GLTF: Can't import file '" + p_state->filename + "', required extension '" + String(p_state->extensions_required[i]) + "' is not supported. Are you missing a GLTFDocumentExtension plugin?");
			ret = ERR_UNAVAILABLE;
		}
	}
	return ret;
}