Tweak code in the README.md file to actually list the available models

Author: lmanul

README.md

@@ -197,7 +197,7 @@ from TTS.api import TTS
 device = "cuda" if torch.cuda.is_available() else "cpu"
 
 # List available 🐸TTS models
-print(TTS().list_models())
+print("\n".join(TTS().list_models().list_models()))
 
 # Init TTS
 tts = TTS("tts_models/multilingual/multi-dataset/xtts_v2").to(device)