fix agent method name

app.py

@@ -105,7 +105,7 @@ def main(input_audio):
             input_audio_segment = convert_to_audio_segment(input_audio)
             transcript = transcriber.transcribe(input_audio_segment)
             logger.info(f"Transcription: {transcript}")
-            response = agent.generate_response(transcript)
+            response = agent.respond(transcript)
             logger.info(f"Agent response: {response}")
             output_audio = synthesizer.synthesize(response)
             return SpeakerOutput.send_audio(output_audio)