Update app.py

app.py

@@ -1,5 +1,6 @@
 """Deploying AI Voice Chatbot Gradio App."""
 from gradio import Audio, Interface, Textbox
+from typing import Tuple
 
 from utils import (TextGenerationPipeline, from_en_translation,
                    html_audio_autoplay, stt, to_en_translation, tts,
@@ -10,7 +11,7 @@ desired_language = "de"
 response_generator_pipe = TextGenerationPipeline(max_length=max_answer_length)
 
 
-def main(audio: object) -> tuple[str, str, str, object]:
+def main(audio: object) -> Tuple[str, str, str, object]:
     """Calls functions for deploying gradio app.
 
     It responds both verbally and in text