Update app.py

app.py

@@ -93,7 +93,7 @@ with gr.Blocks(css=css) as demo:
         
         chatbot = gr.Chatbot([], elem_id="chatbot").style(height=350)
         question = gr.Textbox(label="Question", placeholder="Type your question and hit Enter ")
-        submit_btn = gr.Button("Send Messages")
+        submit_btn = gr.Button("Send Message")
     load_pdf.click(loading_pdf, None, langchain_status, queue=False)    
     load_pdf.click(pdf_changes, inputs=[pdf_doc, openai_key], outputs=[langchain_status], queue=False)
     question.submit(add_text, [chatbot, question], [chatbot, question]).then(