Update app.py

app.py

@@ -94,7 +94,7 @@ def set_background():
     display(HTML(f'''
         <style>
             body {{
-                background-image: url("https://github.com/abdullahzunorain/voice-to-voice-Chatbot/blob/main/thomas-heintz-0tgMnMIYQ9Y-unsplash.jpg");
+                background-image: url("https://raw.githubusercontent.com/abdullahzunorain/voice-to-voice-Chatbot/main/thomas-heintz-0tgMnMIYQ9Y-unsplash.jpg");
                 background-size: cover;
                 background-position: center;
                 background-repeat: no-repeat;