Fix typo: `encodec` pointed to `mel.json`

vocos/__init__.py

@@ -131,7 +131,7 @@ class MelVoco(Voco):
 class EncodecVoco(Voco):
     def __init__(self, bandwidth_id=2):
         super().__init__()
-        config, state_dict = load("mel")
+        config, state_dict = load("encodec")
         model = Vocos.from_config(**config)
         model.load_state_dict(state_dict)
         model.eval()