Update README.md

demos/style_fs2/README.md

@@ -18,6 +18,10 @@ Run the following command line to get started:
 ```
 ./run.sh
 ```
+In `run.sh`, it will execute `source path.sh` firstly, which will set the environment variants.
+
+If you would like to try your own sentence, please replace the sentence in `sentences.txt`.
+
 For more details, please see `style_syn.py`
 
 The audio samples are in [style-control-in-fastspeech2](https://paddlespeech.readthedocs.io/en/latest/tts/demo.html#style-control-in-fastspeech2)