refactor(config): 将logger字段改为静态常量- 在两个XxlJobConfig类中将Logger实例改为static final- 提升日志记录器的内存效率和性能

- 统一代码风格，符合最佳实践

xxl-job-executor-samples/xxl-job-executor-sample-springboot-ai/src/main/java/com/xxl/job/executor/config/XxlJobConfig.java

@@ -14,7 +14,7 @@ import org.springframework.context.annotation.Configuration;
  */
 @Configuration
 public class XxlJobConfig {
-    private Logger logger = LoggerFactory.getLogger(XxlJobConfig.class);
+    private static final Logger logger = LoggerFactory.getLogger(XxlJobConfig.class);
 
     @Value("${xxl.job.admin.addresses}")
     private String adminAddresses;

xxl-job-executor-samples/xxl-job-executor-sample-springboot/src/main/java/com/xxl/job/executor/config/XxlJobConfig.java

@@ -14,7 +14,7 @@ import org.springframework.context.annotation.Configuration;
  */
 @Configuration
 public class XxlJobConfig {
-    private Logger logger = LoggerFactory.getLogger(XxlJobConfig.class);
+    private static final Logger logger = LoggerFactory.getLogger(XxlJobConfig.class);
 
     @Value("${xxl.job.admin.addresses}")
     private String adminAddresses;