app.py: small comment adjustment to rebuild the app

app.py

@@ -29,7 +29,7 @@ def main():
             4. Hit "Generate" and listen to the result!
 
             When you select model for the first time,
-            it will take around 30 seconds to download it.
+            it will take a little time to download it.
             You can learn more about models available
             [here](https://huggingface.co/balacoon/tts),
             visit [Balacoon website](https://balacoon.com/) for more info.