build: change svg to png

See: https://github.com/gradio-app/gradio/issues/884#issuecomment-2349199268

app.py

@@ -688,7 +688,7 @@ with gr.Blocks(
     gr.Markdown(
         """
         <div style="text-align: center;" class="logo-container">
-          <img src='/gradio_api/file=assets/instanovo.svg' alt="InstaNovo Logo" width="300" style="display: block; margin: 0 auto;">
+          <img src='/gradio_api/file=assets/instanovo.png' alt="InstaNovo Logo" width="300" style="display: block; margin: 0 auto;">
         </div>
         """,
         elem_classes="logo-container",