added end_date docstring

app.py

@@ -17,6 +17,7 @@ def fetch_historical_price_data(symbol:str, start_date:str, end_date:str)-> pd.D
     Args:
         symbol: stock market symbol such as 'AAPL', 'MSFT', 'NVDA'
         start_date: start date in YYYY-MM-DD format. Example - '2025-05-10'
+        end_date: end date in YYYY-MM-DD fomrat. Example '2025-11-03'
     """
     FMP_KEY = os.getenv('FMP_KEY')