fix(system): 修正禁用过期AI账号任务中的字段名错误

yudao-module-system/src/main/java/cn/iocoder/yudao/module/system/job/DisableWebAIExpiredAccount.java

@@ -43,7 +43,7 @@ public class DisableWebAIExpiredAccount implements JobHandler{
     public String execute(String param) throws Exception {
         Long tenantId = TenantContextHolder.getTenantId();
         TenantDO tenant = tenantMapper.selectById(tenantId);
-        if (tenant.getExpireTime()!=null) {
+        if (tenant.getAiExpireTime()!=null) {
             Duration brotherDuration = LocalDateTimeUtil.between(tenant.getAiExpireTime(), LocalDateTime.now());
             long minutes = brotherDuration.toMinutes();
             LambdaQueryWrapper<AdminUserDO> aiUserQueryWrapper = new LambdaQueryWrapper<>();