Align label mapping with mrpc config of glue dataset

Hi there, your model is using a default label mapping. Accept this PR to align the label mapping with the `mrpc` 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

@@ -9,14 +9,14 @@
   "hidden_dropout_prob": 0.1,
   "hidden_size": 768,
   "id2label": {
-    "0": "not equivalent",
-    "1": "equivalent"
+    "1": "equivalent",
+    "0": "not_equivalent"
   },
   "initializer_range": 0.02,
   "intermediate_size": 3072,
   "label2id": {
     "equivalent": 1,
-    "not equivalent": 0
+    "not_equivalent": 0
   },
   "layer_norm_eps": 1e-12,
   "max_position_embeddings": 512,
@@ -30,4 +30,4 @@
   "type_vocab_size": 2,
   "use_cache": true,
   "vocab_size": 28996
-}
+}