Update app.py

app.py

@@ -39,7 +39,7 @@ def test_handler(optionSelection, prompt: str = "Write an introductory paragraph
             return "", ""
         case  "Llama 2":
             return "", ""
-        else:
+        case _:
             if optionSelection not in llm_api_options:
                 return ValueError("Invalid choice!"), ""