Update demo.html

Author: aimtyaem

demo.html

@@ -113,7 +113,7 @@ <h3>Core Simulation Logic</h3>
             <div class="vr-preview">
                 <h3>VR Training Preview</h3>
                 <div id="vr-scene">
-                    <img src="ar.gif" alt="VR Scene" style="width:100%">
+                    <img src="img/ar.gif" alt="VR Scene" style="width:100%">
                 </div>
                 <div class="simulation-controls">
                     <button onclick="startScenario()">Start Scenario</button>