Update README.md

Use import statement

gltf/README.md

@@ -31,7 +31,7 @@ gltfpack can also compress textures using Basis Universal format, either storing
 When using compressed files, [js/meshopt_decoder.js](https://github.com/zeux/meshoptimizer/blob/master/js/meshopt_decoder.js) needs to be loaded to provide the WebAssembly decoder module like this:
 
 ```js
-<script src="js/meshopt_decoder.js"></script>
+import MeshoptDecoder from "./meshopt_decoder";
 
 ...