Wasm: fix todo example

Same fix as last commit to the printerdemo

examples/todo/rust/index.html

@@ -31,7 +31,7 @@
     </a>
   </p>
   <script type="module">
-    import init from './pkg/todo.js';
+    import init from './pkg/todo_lib.js';
     init().finally(() => {
       document.getElementById("spinner").remove();
     });