fix: Update type hint for patterns parameter in verify_output_contains_patterns function

Author: chengpinglin

dags/tpu_observability/tpu_info_cli_validation_dags.py

@@ -27,7 +27,6 @@
 import re
 import subprocess
 import tempfile
-from typing import List
 
 from airflow import models
 from airflow.decorators import task
@@ -303,7 +302,7 @@ def execute_tpu_info_cli_command(info, pod_name: str, tpu_args: str) -> str:
 
 
 def verify_output_contains_patterns(
-    output: str, patterns: List[str], context: str
+    output: str, patterns: list[str], context: str
 ):
   """Helper to verify expected strings in output."""
   for pattern in patterns: