### 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


if (!p_state->json.has("animations")) {
		return OK;
	}
	const Array &animations = p_state->json["animations"];
	for (GLTFAnimationIndex i = 0; i < animations.size(); i++) {
		const Dictionary &d = animations[i];
		Ref<GLTFAnimation> animation;
		animation.instantiate();
		if (!d.has("channels") || !d.has("samplers")) {
			continue;
		}
		Array channels = d["channels"];
		Array samplers = d["samplers"];
		if (d.has("name")) {
			const String anim_name = d["name"];
			const String anim_name_lower = anim_name.to_lower();
			if (anim_name_lower.begins_with("loop") || anim_name_lower.ends_with("loop") || anim_name_lower.begins_with("cycle") || anim_name_lower.ends_with("cycle")) {
				animation->set_loop(true);
			}
			animation->set_name(_gen_unique_animation_name(p_state, anim_name));