Update app.py

app.py

@@ -261,7 +261,7 @@ with gr.Blocks(css=css) as demo:
                 with gr.Row():
                     target_ratio = gr.Radio(
                         label="Expected Ratio",
-                        choices=["1:1","9:16", "16:9", "2:3" ,"3:2","3:4","4:3" "Custom"],
+                        choices=["1:1","9:16", "16:9", "2:3" ,"3:2","3:4","4:3", "Custom"],
                         value="9:16",
                         scale=2
                     )