Fix load scene example to use proper serialization format for rotation field (#10638)

# Objective

Fixes #10479

## Solution

- Updated scene file

assets/scenes/load_scene_example.scn.ron

@@ -13,7 +13,12 @@
             y: 0.0,
             z: 0.0
           ),
-          rotation: (0.0, 0.0, 0.0, 1.0),
+          rotation: (
+            x: 0.0,
+            y: 0.0,
+            z: 0.0,
+            w: 1.0,
+          ),
           scale: (
             x: 1.0,
             y: 1.0,