possible fix for low quality downloads

attempting to make the outputs download as png rather than webp but I can't test this as I don't have a pro subscription.
got the potential fix from https://huggingface.co/spaces/multimodalart/flux-lora-the-explorer/discussions/8

app.py

@@ -359,6 +359,7 @@ with gr.Blocks(css=css) as demo:
                 result = ImageSlider(
                     interactive=False,
                     label="Generated Image",
+                    format="png")
                 )
                 use_as_input_button = gr.Button("Use as Input Image", visible=False)