Update app.py

gr.Box() -> gr.Group()

app.py

@@ -18,7 +18,7 @@ with gr.Blocks(theme='ParityError/Anime') as demo:
                 """
             )
         with gr.Column(scale=3):
-            with gr.Box():
+            with gr.Group():
                 dropdown.render()
                 toggle_dark = gr.Button(value="Toggle Dark").style(full_width=True)