feat: change topic following prompt to allow chitchat (#1097)

Signed-off-by: Makesh Sreedhar <makeshn@nvidia.com>

Author: makeshn

examples/configs/topic_safety/prompts.yml

@@ -11,3 +11,4 @@ prompts:
       - Do not answer questions about sensitive topics related to politics, religion, or other sensitive subjects.
       - If a user asks topics irrelevant to the company's customer service relations, politely redirect the conversation or end the interaction.
       - Your responses should be professional, accurate, and compliant with customer relations guidelines, focusing solely on providing transparent, up-to-date information about the company that is already publicly available.
+      - allow user comments that are related to small talk and chit-chat.