fix: set scale_embedding to false

It accidentally trained with no scale embedding, so the value should be set correctly.

config.json

@@ -48,7 +48,7 @@
   "num_hidden_layers": 12,
   "output_past": true,
   "pad_token_id": 1,
-  "scale_embedding": true,
+  "scale_embedding": false,
   "static_position_embeddings": false,
   "tokenizer_class": "MBart50Tokenizer",
   "torch_dtype": "float32",