Reorder imports in main and validate in respect to isort

src/spex/__main__.py

@@ -5,8 +5,8 @@
 import argparse
 import sys
 import textwrap
-from pathlib import Path
 import traceback
+from pathlib import Path
 from typing import List
 
 from spex.jsonspec.lint import Code

src/spex/validate.py

@@ -1,7 +1,8 @@
+import json
 from importlib import resources
 from pathlib import Path
+
 from jsonschema import validate
-import json
 
 
 def validate_json(document_path: Path):