chore(deps): update dependency google-auth to v2.6.4 (#160)

Author: renovate-bot

contact-center-insights/snippets/requirements-test.txt

@@ -1,4 +1,4 @@
-google-auth==2.6.3
+google-auth==2.6.4
 google-cloud-pubsub==2.12.0
 protobuf==3.20.0
 pytest==7.1.1