Replaced Discover Three.js with Three.js Journey

index.html

@@ -70,7 +70,7 @@
 					<h2>Resources</h2>
 					<ul>
 						<li><a href="https://threejsfundamentals.org/" target="_blank" rel="noopener">Three.js Fundamentals</a></li>
-						<li><a href="https://discoverthreejs.com/" target="_blank" rel="noopener">Discover Three.js</a></li>
+						<li><a href="https://threejs-journey.xyz/" target="_blank" rel="noopener">Three.js Journey</a></li>
 						<li><a href="https://www.packtpub.com/web-development/learn-threejs-third-edition" target="_blank" rel="noopener">Learn Three.js</a></li>
 						<li><a href="https://www.amazon.co.jp/初めてのThree-js-第2版-_WebGLのためのJavaScript-3Dライブラリ-Dirksen/dp/4873117704/" target="_blank" rel="noopener">初めてのThree.js</a></li>
 					</ul>