fix test

Author: Nikita

tests/test_cron.py

@@ -1,4 +1,4 @@
-from datetime import datetime
+from datetime import datetime, timezone
 
 import pytest
 from cron_converter import Cron
@@ -40,7 +40,8 @@ def test_cron_str_next_after() -> None:
     cron_value = CronStr('15 8 * * 1-5')
     next_run = cron_value.next_after(datetime(2024, 1, 1, 7, 0))
     assert next_run == datetime(2024, 1, 1, 8, 15)
-    assert cron_value.next_run.startswith(str(datetime.utcnow().year))  # sanity check for property access
+    current_year = datetime.now(timezone.utc).year
+    assert cron_value.next_run.startswith(str(current_year))  # sanity check for property access
 
 
 def test_cron_str_strips_whitespace() -> None: