Align label mapping with mnli config of glue dataset

Hi there, your model is using a default label mapping. Accept this PR to align the label mapping with the `mnli` config of the `glue` dataset this model was trained on. This will enable your model to be evaluated by [Hugging Face's automatic model evaluator](https://huggingface.co/spaces/autoevaluate/model-evaluator?dataset=glue)

config.json

@@ -15,17 +15,17 @@
   "hidden_dropout_prob": 0,
   "hidden_size": 768,
   "id2label": {
-    "0": "LABEL_0",
-    "1": "LABEL_1",
-    "2": "LABEL_2"
+    "0": "entailment",
+    "1": "neutral",
+    "2": "contradiction"
   },
   "initializer_range": 0.02,
   "inner_group_num": 1,
   "intermediate_size": 3072,
   "label2id": {
-    "LABEL_0": 0,
-    "LABEL_1": 1,
-    "LABEL_2": 2
+    "entailment": 0,
+    "neutral": 1,
+    "contradiction": 2
   },
   "layer_norm_eps": 1e-12,
   "max_position_embeddings": 512,
@@ -42,4 +42,4 @@
   "transformers_version": "4.9.1",
   "type_vocab_size": 2,
   "vocab_size": 30000
-}
+}