fix: not change subscribed reference

[eXponenta]

State MUST store actual reference to subscribed, but unsubscribe produce new Array which will unmatch with same field in state.

I use custom render loop and for me this is critical bug.
I can't use boxed loop because it use requestAnimationFrame from window, that not working in XR mode (XRSession has own requestAnimationFrame that needs to use instead of window.requestAnimationFrame)

	const animate = (time?: number) => {
		state.animation = renderer.requestAnimationFrame(animate);

		// update OGL useFrame
		subscribed.forEach((ref: any) => ref.current?.(state, time));

		// Render to screen
		renderer.render({ scene, camera, frustumCull: false } as any);
	};

	state.animation = renderer.requestAnimationFrame(animate);

[CodyJasonBennett]

Published this to 0.1.5. Can look into playing nicer with WebXR.