feat: upgrade to Spring Boot version 3 (#1477)

src/main/java/org/owasp/webgoat/container/assignments/LessonTrackerInterceptor.java

@@ -75,7 +75,8 @@ public class LessonTrackerInterceptor implements ResponseBodyAdvice<Object> {
     } else {
       userTracker.assignmentFailed(webSession.getCurrentLesson());
     }
-    userTrackerRepository.saveAndFlush(userTracker);
+    userTrackerRepository.save(userTracker);
+
     return attackResult;
   }
 }