Update app.py

app.py

@@ -108,7 +108,7 @@ with gr.Blocks() as demo:
     gr.Markdown("# Chat with your PDF documents")
     
     with gr.Row():
-        file_input = gr.File(label="Upload your PDF documents", file_types=[".pdf"], multiple=True)
+        file_input = gr.Files(label="Upload your PDF documents", file_types=[".pdf"])
         update_button = gr.Button("Update Vector Store")
     
     update_output = gr.Textbox(label="Update Status")