conver to ar js code example

Example 1: ar.js getting started

<script src="https://raw.githack.com/AR-js-org/AR.js/master/aframe/build/aframe-ar.js">

Example 2: ar.js getting started

<script src="https://raw.githack.com/AR-js-org/AR.js/3.0.0/aframe/build/aframe-ar-nft.js">