fix banner name

app.py

@@ -543,7 +543,7 @@ def main():
     print("Model parameter caching complete.")
 
     with gr.Blocks(title="DataForge - Synthetic Data Generation") as demo:
-        gr.Image("dataforge.png", show_label=False, show_download_button=False, container=False, height=300)
+        gr.Image("dataforge_banner.png", show_label=False, show_download_button=False, container=False, height=300)
         # Store the current oauth token for use in submit_request
         current_oauth_token = gr.State(None)
         with gr.Row():