Update deprecated Python 3.8 typing (#13971)

tests/entrypoints/openai/test_root_path.py

@@ -2,7 +2,7 @@
 
 import contextlib
 import os
-from typing import Any, List, NamedTuple
+from typing import Any, NamedTuple
 
 import openai  # use the official client for correctness check
 import pytest
@@ -40,7 +40,7 @@ def server():
 
 class TestCase(NamedTuple):
     model_name: str
-    base_url: List[str]
+    base_url: list[str]
     api_key: str
     expected_error: Any