[release] Fix lint issue (#2567)

Signed-off-by: khluu <khluu000@gmail.com>

.buildkite/scripts/generate-nightly-index.py

@@ -4,6 +4,7 @@
 
 import argparse
 import json
+import re
 import sys
 from dataclasses import asdict, dataclass
 from datetime import datetime
@@ -11,8 +12,6 @@ from pathlib import Path
 from typing import Any
 from urllib.parse import quote
 
-import re
-
 
 def normalize_package_name(name: str) -> str:
     """Normalize package name per PEP 503."""