Update Code Snippet

Fixing error `'TTSTransformerModel' object is not subscriptable`

README.md

@@ -20,6 +20,10 @@ widget:
 - Trained on [CSS10](https://github.com/Kyubyong/css10)
 
 ## Usage
+Dependencies
+```sh
+pip install fairseq sentencepiece
+```
 
 ```python
 from fairseq.checkpoint_utils import load_model_ensemble_and_task_from_hf_hub
@@ -33,7 +37,7 @@ models, cfg, task = load_model_ensemble_and_task_from_hf_hub(
 )
 model = models[0]
 TTSHubInterface.update_cfg_with_data_cfg(cfg, task.data_cfg)
-generator = task.build_generator(model, cfg)
+generator = task.build_generator([model], cfg)
 
 text = "Hola, esta es una prueba."