Revise image and description for random scene

Updated image description and added a new image for the random scene.

Author: ab17dogar

README.md

@@ -198,9 +198,10 @@ project-csi/
 *BVH acceleration test with multiple objects*
 
 ### Random Scene
-<img src="renders/samples/output.png" alt="Scene with Chair Obj rendering and light Source Materials" width="400"/>
+<img src="renders/samples/output.png" alt="Random Scene" width="400"/>
+
+*Scene with Chair Obj Rendering and Point Light Material*
 
-*Scene with Chair Obj rendering and light Source Materials*
 ---
 
 ## 🎬 Demo Video