Update config.json

When I tried to load model, I got "ValueError: Unrecognized model in hazal/BioBERTurkcased-con-trM-trR."
To fix the issue, I added "model_type": "bert" .

config.json

@@ -5,6 +5,7 @@
   "hidden_size": 768,
   "initializer_range": 0.02,
   "intermediate_size": 3072,
+  "model_type": "bert",
   "max_position_embeddings": 512,
   "num_attention_heads": 12,
   "num_hidden_layers": 12,