Update prompts/main_prompt.py

prompts/main_prompt.py

@@ -162,4 +162,4 @@ So, **Ali got the better deal!**"
 "Great job today! Would you like to explore additional examples or discuss how to use these strategies in the classroom?"
 """
 
-    return "🎉 **End of module! Thanks for participating.**"
+    return "🎉 **End of this module! Thanks for participating.**"