Update packages/google-auth/google/auth/transport/urllib3.py

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: hebaalazzeh

packages/google-auth/google/auth/transport/urllib3.py

@@ -19,7 +19,7 @@
 
 import http.client as http_client
 import logging
-from typing import Set
+from typing import Set, TYPE_CHECKING
 import warnings
 
 # Certifi is Mozilla's certificate bundle. Urllib3 needs a certificate bundle