[pre-commit.ci] auto fixes from pre-commit.com hooks

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django_celery_beat/models.py

@@ -4,8 +4,9 @@
 except ImportError:
  from backports.zoneinfo import available_timezones
 
-from datetime import timedelta
 import decimal
+from datetime import timedelta
+
 import timezone_field
 from celery import current_app, schedules
 from cron_descriptor import (FormatException, MissingFieldException,