better initial value for step size

app.py

@@ -476,7 +476,7 @@ def build_app():
                     label="horizon (forecast horizon)",
                 )
                 step_slider = gr.Slider(
-                    minimum=1, maximum=12, value=1, step=1,
+                    minimum=1, maximum=12, value=3, step=1,
                     label="step (step size between folds)",
                 )
                 window_slider = gr.Slider(