Fix typo in canvas tiles example

examples/canvas-tiles.js

@@ -42,7 +42,7 @@ domMap.bindTo('layers', webglMap);
 domMap.bindTo('view', webglMap);
 
 var canvasMap = new ol.Map({
-  renderer: ol.RendererHint.DOM,
+  renderer: ol.RendererHint.CANVAS,
   target: 'canvasMap'
 });
 canvasMap.bindTo('layers', webglMap);