Examples: Fix wrong color space. (#28828)

examples/webgpu_equirectangular.html

@@ -45,6 +45,7 @@
 				camera.position.set( 1, 0, 0 );
 
 				const equirectTexture = new THREE.TextureLoader().load( 'textures/2294472375_24a3b8ef46_o.jpg' );
+				equirectTexture.colorSpace = THREE.SRGBColorSpace;
 
 				scene = new THREE.Scene();
 				scene.backgroundNode = texture( equirectTexture, equirectUV(), 0 );