add visible=False for markdown when no file is uploaded yet

app.py

@@ -165,7 +165,7 @@ with gr.Blocks(css=css) as demo:
                 question = gr.Textbox(label="Question", scale=9)
                 u = gr.UploadButton("Upload", file_count="single", scale=1)
                 with gr.Group():
-                    file_name = gr.Markdown("")
+                    file_name = gr.Markdown("", visible=False)
                     c = gr.ClearButton([u, file_name], visible=False, scale=1)
                     # d = gr.DownloadButton("Download the file", visible=False, scale=1)
             with gr.Row():