Update app.py

Removed type hint

app.py

@@ -17,7 +17,7 @@ def app_fn(
     learning_rate: float,
     n_estimators: int,
     max_depth: int,
-) -> list[go.Figure, pd.DataFrame]:  
+):  
     # Generating Data
     x_range = [0, 10]
     seed = 42