fix bug

app.py

@@ -1,4 +1,4 @@
-# WebUI by mrfakename <X @realmrfakename / HF @mrfakename>
+# WebUI by mrfakename
 # Demo also available on HF Spaces: https://huggingface.co/spaces/mrfakename/MeloTTS
 import gradio as gr
 import os, torch, io
@@ -7,6 +7,8 @@ os.system('python -m unidic download')
 from melo.api import TTS
 speed = 1.0
 import tempfile
+import nltk
+nltk.download('averaged_perceptron_tagger_eng')
 device = 'cuda' if torch.cuda.is_available() else 'cpu'
 models = {
     'EN': TTS(language='EN', device=device),