Added images in index.html

Author: CharlesDuboisSAP

sample-code/spring-app/src/main/java/com/sap/ai/sdk/app/controllers/SpringAiOrchestrationController.java

@@ -22,7 +22,7 @@
 
 /** Endpoints for the Orchestration service */
 @RestController
-@RequestMapping("/orchestration")
+@RequestMapping("/spring-ai-orchestration")
 class SpringAiOrchestrationController {
 
   private final ChatModel client = new OrchestrationChatModel();