Align label mapping with mrpc config of glue dataset (#1)

- Align label mapping with mrpc config of glue dataset (76af90faef5427e435eef58d15370c9a99e9c50b)


Co-authored-by: Lewis Tunstall <lewtun@users.noreply.huggingface.co>

config.json

@@ -26,5 +26,13 @@
   "transformers_version": "4.18.0",
   "type_vocab_size": 1,
   "use_cache": true,
-  "vocab_size": 50265
-}
+  "vocab_size": 50265,
+  "label2id": {
+    "not_equivalent": 0,
+    "equivalent": 1
+  },
+  "id2label": {
+    "0": "not_equivalent",
+    "1": "equivalent"
+  }
+}