Update style on app.py file

app.py

@@ -298,8 +298,8 @@ chatbot = gr.Chatbot(avatar_images=["user.png", "bot.jpg"], height="100%",contai
 
 js_code = """
 <style>
-     html {
-        background-color: transparent !important;
+     body {
+        background: transparent !important;
     }
     
     #component-0 {