Fix: NameError scheduler_gui -> sampler_gui at line 2231

- Variable was named sampler_gui (line 1607), not scheduler_gui
- Fixes crash on startup when defining sampler_selector_gui.change outputs

app.py

@@ -2228,7 +2228,7 @@ with gr.Blocks(elem_id="main", fill_width=True, fill_height=False) as app:
                         fn=set_sampler_settings,
                         inputs=[sampler_selector_gui],
                         outputs=[
-                            steps_gui, cfg_gui, scheduler_gui, schedule_type_gui,
+                            steps_gui, cfg_gui, sampler_gui, schedule_type_gui,
                             schedule_prediction_type_gui,
                         ],
                     )