change to recognized service-b

src/main/java/com/example/mmad/testapp/controller/PersonController.java

@@ -23,7 +23,7 @@ public class PersonController {
     @PostMapping("/list")
     @ResponseStatus(HttpStatus.OK)
     public String listPosts() {
-        return "aaa";
+        return "bbb";
     }
 
     @CrossOrigin(origins = "http://localhost:3001")