Update app.py

app.py

@@ -115,7 +115,7 @@ with app:
     gr.Markdown("### <center>中转key获取地址[here](https://buy.sipola.cn),ai文案生成可使用中转key,请访问 [here](https://ai.sipola.cn)</center>")
     with gr.Tab("TTS文本生语音"):
         with gr.Row(variant='panel'):
-            api_key = gr.Textbox(type='password', label='API Key', placeholder='请在此填写您的中转API Key')
+            api_key = gr.Textbox(type='password', label='API Key', placeholder='请在此填写您在https://buy.sipola.cn获取的中转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')
             voice = gr.Dropdown(choices=['alloy', 'echo', 'fable', 'onyx', 'nova', 'shimmer'], label='请选择一个说话人', value='alloy')
         with gr.Row():