Use correct canvas size for scale factor change

examples/web.rs

@@ -59,7 +59,10 @@ mod wasm {
         let body = document.body().unwrap();
 
         // Set a background color for the canvas to make it easier to tell where the canvas is for debugging purposes.
-        canvas.style().set_css_text("background-color: crimson;");
+        canvas
+            .style()
+            .set_property("background-color", "crimson")
+            .unwrap();
         body.append_child(&canvas).unwrap();
 
         let log_header = document.create_element("h2").unwrap();