Fixed error loadng model

`task.build_generator(models, cfg)` requires a list, this causes an error due to `model = models[0]`

README.md

@@ -31,14 +31,14 @@ models, cfg, task = load_model_ensemble_and_task_from_hf_hub(
     "facebook/fastspeech2-en-ljspeech",
     arg_overrides={"vocoder": "hifigan", "fp16": False}
 )
-model = models[0]
+
 TTSHubInterface.update_cfg_with_data_cfg(cfg, task.data_cfg)
-generator = task.build_generator(model, cfg)
+generator = task.build_generator(models, cfg)
 
 text = "Hello, this is a test run."
 
 sample = TTSHubInterface.get_model_input(task, text)
-wav, rate = TTSHubInterface.get_prediction(task, model, generator, sample)
+wav, rate = TTSHubInterface.get_prediction(task, models[0], generator, sample)
 
 ipd.Audio(wav, rate=rate)
 ```