Update app.py

app.py

@@ -37,7 +37,7 @@ def generate_release_notes(github_repo, github_token, gemini_api_key, start_date
         Provide a concise summary for each item. Do not include any links, but keep issue numbers if present.
         
         Important formatting instructions:
-        - Use plain text only, no special formatting
+        - The output should be plain text without any markdown or "-" for post processing
         - Use section titles followed by a colon (e.g., "New Features:")
         - Start each item on a new line
         - Be sure to briefly explain the why and benefits of the change for average users that are non-technical