fix: use example speaker select dropdown will disappear

app.py

@@ -195,7 +195,7 @@ with demo:
         interactive=len(models_config[default_model_id]["speaker_mapping"]) > 1,
         visible=False,
     )
-    use_default_emb_or_custom_radio.input(
+    use_default_emb_or_custom_radio.change(
         use_default_emb_or_custom_radio_input,
         inputs=[use_default_emb_or_custom_radio],
         outputs=[speaker_wav, speaker_drop_down],