### 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


int start = uri.find(",");
	ERR_FAIL_COND_V(start == -1, Vector<uint8_t>());
	CharString substr = uri.substr(start + 1).ascii();
	int strlen = substr.length();
	Vector<uint8_t> buf;
	buf.resize(strlen / 4 * 3 + 1 + 1);
	size_t len = 0;
	ERR_FAIL_COND_V(CryptoCore::b64_decode(buf.ptrw(), buf.size(), &len, (unsigned char *)substr.get_data(), strlen) != OK, Vector<uint8_t>());
	buf.resize(len);
	return buf;
}
Error GLTFDocument::_encode_buffer_glb(Ref<GLTFState> p_state, const String &p_path) {
	print_verbose("glTF: Total buffers: " + itos(p_state->buffers.size()));
	if (!p_state->buffers.size()) {
		return OK;
	}