docs(samples): added comment to webhook sample (#211)

* docs(samples): added comment to webhook sample

* Update samples/snippets/webhook.py

Co-authored-by: Leah E. Cole <[email protected]>

* comments fix

Co-authored-by: Leah E. Cole <[email protected]>

Author: galz10

Dialogflow-CX/webhook.py

@@ -15,6 +15,8 @@
 
 # [START dialogflow_cx_webhook]
 
+# TODO(developer): change entry point to handle_webhook in cloud function
+
 
 def handle_webhook(request):