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

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

jupyter_scheduler/scheduler.py

@@ -2,8 +2,8 @@
 import os
 import random
 import shutil
-from typing import Dict, List, Optional, Type, Union
 import subprocess
+from typing import Dict, List, Optional, Type, Union
 
 import fsspec
 import psutil