Update app.py

app.py

@@ -93,7 +93,7 @@ with app:
     gr.Markdown("# <center>🌟 - OpenAI TTS + AI变声</center>")
     gr.Markdown("### <center>🎶 地表最强文本转语音模型 + 3秒实时AI变声，支持中文！Powered by [OpenAI TTS](https://platform.openai.com/docs/guides/text-to-speech) and [KNN-VC](https://github.com/bshall/knn-vc) </center>")
     gr.Markdown("### <center>🌊 更多精彩应用，敬请关注[滔滔AI](http://www.talktalkai.com)；滔滔AI，为爱滔滔！💕</center>")
-    with gr.Tab("🤗 OpenAI TTS")
+    with gr.Tab("🤗 OpenAI TTS"):
         with gr.Row(variant='panel'):
           api_key = gr.Textbox(type='password', label='OpenAI API Key', placeholder='请在此填写您的OpenAI API Key')
           model = gr.Dropdown(choices=['tts-1','tts-1-hd'], label='请选择模型（tts-1推理更快，tts-1-hd音质更好）', value='tts-1')