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

for more information, see https://pre-commit.ci

jupyter_scheduler/tests/test_execution_manager.py

@@ -1,4 +1,5 @@
 import shutil
+
 import pytest
 
 from jupyter_scheduler.executors import DefaultExecutionManager

jupyter_scheduler/tests/test_scheduler.py

@@ -1,7 +1,7 @@
 """Tests for scheduler"""
 
-from pathlib import Path
 import shutil
+from pathlib import Path
 from unittest import mock
 from unittest.mock import patch