Update app.py

app.py

@@ -9,7 +9,7 @@ def fetch_positive_news():
     response = openai.ChatCompletion.create(
         model="gpt-4o",
         messages=[
-            {"role": "user", "content": "What was a positive news story that happened today?"}
+            {"role": "user", "content": "What was a news story related to AI & ML that happened today?"}
         ],
         tools=[{"type": "web_search"}],
         tool_choice="auto"