Update app.py

app.py

@@ -192,7 +192,7 @@ with gr.Blocks(css="style.css") as demo:
             result = gr.Image(label="Result", height=440, width=440, elem_id="output_image", show_label=False, show_download_button=True)
             download_output = gr.Button("Download output", elem_id="download_output")
         gr.HTML("""
-            <button id="fullscreen" onclick="document.body.querySelector("#main_row").requestFullscreen();">fullscreen</button>
+            <button id="fullscreen" onclick="document.body.querySelector('#main_row').requestFullscreen();">fullscreen</button>
             """)