Align label mapping with mrpc config of glue dataset

config.json

@@ -24,5 +24,13 @@
   "transformers_version": "4.20.1",
   "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"
+  }
+}