Update app.py

app.py

@@ -122,7 +122,7 @@ Question:
 def chat(message, history):
     return generate_answer(message)
 
-with gr.Blocks(theme=gr.themes.Soft()) as demo:
+with gr.Blocks() as demo:
     gr.Markdown("# 📚 RAG Chatbot (ML Book)")
     gr.Markdown("Ask questions from *Hands-On Machine Learning* PDF")
 
@@ -132,4 +132,5 @@ with gr.Blocks(theme=gr.themes.Soft()) as demo:
         textbox=gr.Textbox(placeholder="Ask a question...", container=False),
     )
 
-demo.launch()
+demo.launch(theme=gr.themes.Soft())
+