deps: update dependency google.auth to v2.49.2 (GoogleCloudPlatform#4320)

Author: renovate-bot

samples/python/django/requirements.txt

@@ -2,6 +2,6 @@ psycopg-binary==3.3.3
 pytz==2026.1.post1
 Django==5.2.13
 google==3.0.0
-google.auth==2.49.1
+google.auth==2.49.2
 testcontainers==4.14.1
 requests==2.33.0