Update app.py

app.py

@@ -21,7 +21,7 @@ def get_stock_news(symbol: str)-> str: #it's import to specify the return type
 
     api_key = os.getenv("MKTAUX_API_KEY", "YOUR_DEFAULT_API_KEY")
     if not api_key:
-    raise ValueError("API key is missing! Set MKTAUX_API_KEY in your environment.")
+         raise ValueError("API key is missing! Set MKTAUX_API_KEY in your environment.")
     url = f"https://api.marketaux.com/v1/news/all?symbols={symbol}&filter_entities=true&language=en&api_token={api_key}"
 
     response = requests.get(url)