Removed usage of strftime method which is now deprecated in PHP 8.1, same change as was done in core Magento: magento/magento2@f18ca37

Author: hostep

Cron/ScheduleJob.php

@@ -42,8 +42,8 @@ public function schedule(string $jobCode): bool
         $schedule
             ->setJobCode($jobCode)
             ->setStatus(CronScheduleModel::STATUS_PENDING)
-            ->setCreatedAt(strftime('%Y-%m-%d %H:%M:%S', $createdAtTime) ?: '')
-            ->setScheduledAt(strftime('%Y-%m-%d %H:%M', $scheduledAtTime) ?: '')
+            ->setCreatedAt(date('Y-m-d H:i:s', $createdAtTime) ?: '')
+            ->setScheduledAt(date('Y-m-d H:i', $scheduledAtTime) ?: '')
             ->save();
 
         return true;