Update config.json

config.json

@@ -160,7 +160,7 @@
     "length_penalty": 1.0,
     "max_length": 20,
     "min_length": 0,
-    "model_type": "",
+    "model_type": "davit",
     "no_repeat_ngram_size": 0,
     "num_beam_groups": 1,
     "num_beams": 1,