feat: Fix selected space loading in app.py

This commit fixes the loading of the selected space in the `infer` function of `app.py`. The code now attempts to load the next available space from the list of spaces until a successful load is achieved, ensuring proper model loading and preventing errors during inference.

app.py

@@ -78,7 +78,7 @@ with gr.Blocks(css=css) as demo:
         """)
         space = gr.Text(
             label="HF Space",
-            value=flux_1_schell_spaces[selected_space_index]
+            value=flux_1_schell_spaces[0]
         )            
         
         with gr.Row():