Update webgpu_sandbox.html

Fix texture path.

examples/webgpu_sandbox.html

@@ -67,7 +67,7 @@
 					.setTranscoderPath( 'jsm/libs/basis/' )
 					.detectSupportAsync( renderer );
 
-				const ktxTexture = await ktxLoader.loadAsync( './textures/compressed/sample_uastc_zstd.ktx2' );
+				const ktxTexture = await ktxLoader.loadAsync( './textures/ktx2/2d_uastc.ktx2' );
 
 				// box mesh