Update app.py

app.py

@@ -68,7 +68,7 @@ def tag_image(pil_image: Image.Image, output_format: str) -> str:
         return "\n".join(lines)
 
 # Build the Gradio Blocks UI
-demo = gr.Blocks(theme=gr.themes.Soft())  # using a built-in theme for nicer styling
+demo = gr.Blocks(theme="gradio/soft")  # using a built-in theme for nicer styling
 
 with demo:
     # Header Section