Update app.py

app.py

@@ -867,7 +867,9 @@ def run_gradio_interface():
 
         This interface is based on [Ebook2AudioBookXTTS](https://github.com/DrewThomasson/ebook2audiobookXTTS).
 
-        Free Google Colab [![Free Google Colab](https://github.com/user-attachments/assets/a8a0d8c8-d605-4f52-a812-d45c779510a9)](https://colab.research.google.com/github/DrewThomasson/ebook2audiobookXTTS/blob/main/Notebooks/colab_ebook2audiobookxtts.ipynb)
+        Xtts is very slow, you should just run it locally with docker, info in ebook2audiobookxtts github
+
+        Or on Free Google Colab [![Free Google Colab](https://github.com/user-attachments/assets/a8a0d8c8-d605-4f52-a812-d45c779510a9)](https://colab.research.google.com/github/DrewThomasson/ebook2audiobookXTTS/blob/main/Notebooks/colab_ebook2audiobookxtts.ipynb)
 
         """
         )