Align label mapping with sst2 config of glue dataset (#1)

- Align label mapping with sst2 config of glue dataset (1f64735b46a5b372c3d37168701ad7b860f4043b)


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": {
+    "negative": 0,
+    "positive": 1
+  },
+  "id2label": {
+    "0": "negative",
+    "1": "positive"
+  }
+}