chore(deps): update dependency google-cloud-dialogflow-cx to v1.13.4 (#464)

Author: renovate-bot

Dialogflow-CX/requirements.txt

@@ -1,2 +1,2 @@
-google-cloud-dialogflow-cx==1.13.1
+google-cloud-dialogflow-cx==1.13.4
 Flask==2.2.2