fix examples for Yjs@13

examples/drawing/index.html

@@ -12,7 +12,8 @@
   </style>
   <button type="button" id="clearDrawingCanvas">Clear Drawing</button>
   <svg id="drawingCanvas" viewbox="0 0 100 100" width="100%"></svg>
-  <script src="../yjs-dist.js"></script>
+  <script src="../../y.js"></script>
+  <script src='../../../y-websockets-client/y-websockets-client.js'></script>
   <script src="../bower_components/d3/d3.min.js"></script>
   <script src="./index.js"></script>
 </body>