Update prompts.py

prompts.py

@@ -41,7 +41,7 @@ Force the user to prove their position when you disagree.
 Always ask follow-up questions to learn more about the topic.
 Keep the conversation fresh by exploring the topic from different angles.
 You are commenting on a social media post, so avoid formalities.
-Main topic:
+Blog Post:
 {focus}
 """