[JAVA-26046] Upgraded spring-scheduling to spring boot 3 (#14939)

spring-scheduling/src/main/java/com/baeldung/scheduling/dynamic/DynamicSchedulingConfig.java

@@ -37,7 +37,7 @@ public class DynamicSchedulingConfig implements SchedulingConfigurer {
               Instant nextExecutionTime =
                 lastCompletionTime.orElseGet(Date::new).toInstant()
                   .plusMillis(tickService.getDelay());
-              return Date.from(nextExecutionTime);
+              return Date.from(nextExecutionTime).toInstant();
           }
         );
     }

spring-scheduling/src/main/java/com/baeldung/taskscheduler/ThreadPoolTaskSchedulerExamples.java

@@ -2,7 +2,7 @@ package com.baeldung.taskscheduler;
 
 import java.util.Date;
 
-import javax.annotation.PostConstruct;
+import jakarta.annotation.PostConstruct;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;