Update config.json

This should fix the issue with AutoModelForSeq2SeqLM

config.json

@@ -27,7 +27,7 @@
   "is_encoder_decoder": true,
   "max_length": 200,
   "max_position_embeddings": 1024,
-  "model_type": "nllb_moe",
+  "model_type": "nllb-moe",
   "moe_eval_capacity_token_fraction": 1.0,
   "moe_token_dropout": 0.2,
   "normalize_router_prob_before_dropping": false,