Fix audio sample rate access in end2end.py for correct output retrieval

Signed-off-by: tzhouam <tzhouam@connect.ust.hk>

examples/offline_inference/qwen3_tts/end2end.py

@@ -246,7 +246,7 @@ def main(args):
             request_id = output.request_id
             audio_tensor = output.outputs[0].multimodal_output["audio"]
             output_wav = os.path.join(output_dir, f"output_{request_id}.wav")
-            audio_samplerate = output.multimodal_output["sr"].item()
+            audio_samplerate = output.outputs[0].multimodal_output["sr"].item()
             # Convert to numpy array and ensure correct format
             audio_numpy = audio_tensor.float().detach().cpu().numpy()