### 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


for (GLTFNodeIndex node_i = 0; node_i < p_state->nodes.size(); node_i++) {
		for (int j = 0; j < p_state->nodes[node_i]->children.size(); j++) {
			GLTFNodeIndex child_i = p_state->nodes[node_i]->children[j];
			ERR_FAIL_INDEX_V(child_i, p_state->nodes.size(), ERR_FILE_CORRUPT);
			ERR_CONTINUE(p_state->nodes[child_i]->parent != -1); 
			p_state->nodes.write[child_i]->parent = node_i;
		}
	}
	_compute_node_heights(p_state);
	return OK;
}
void GLTFDocument::_compute_node_heights(Ref<GLTFState> p_state) {
	p_state->root_nodes.clear();
	for (GLTFNodeIndex node_i = 0; node_i < p_state->nodes.size(); ++node_i) {
		Ref<GLTFNode> node = p_state->nodes[node_i];
		node->height = 0;
		GLTFNodeIndex current_i = node_i;
		while (current_i >= 0) {
			const GLTFNodeIndex parent_i = p_state->nodes[current_i]->parent;
			if (parent_i >= 0) {
				++node->height;
			}
			current_i = parent_i;
		}
		if (node->height == 0) {
			p_state->root_nodes.push_back(node_i);
		}
	}
}
static Vector<uint8_t> _parse_base64_uri(const String &uri) {