chore(deps): update dependency google-cloud-dialogflow-cx to v1.8.0 (#233)

Co-authored-by: Anthonios Partheniou <[email protected]>

Author: renovate-bot

Dialogflow-CX/requirements.txt

@@ -1,2 +1,2 @@
-google-cloud-dialogflow-cx==1.7.0
+google-cloud-dialogflow-cx==1.8.0
 Flask==2.0.2