Align label mapping with emotion dataset

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

config.json

@@ -10,22 +10,22 @@
   "hidden_dropout_prob": 0.1,
   "hidden_size": 768,
   "id2label": {
-    "0": "LABEL_0",
-    "1": "LABEL_1",
-    "2": "LABEL_2",
-    "3": "LABEL_3",
-    "4": "LABEL_4",
-    "5": "LABEL_5"
+    "0": "sadness",
+    "1": "joy",
+    "2": "love",
+    "3": "anger",
+    "4": "fear",
+    "5": "surprise"
   },
   "initializer_range": 0.02,
   "intermediate_size": 3072,
   "label2id": {
-    "LABEL_0": 0,
-    "LABEL_1": 1,
-    "LABEL_2": 2,
-    "LABEL_3": 3,
-    "LABEL_4": 4,
-    "LABEL_5": 5
+    "sadness": 0,
+    "joy": 1,
+    "love": 2,
+    "anger": 3,
+    "fear": 4,
+    "surprise": 5
   },
   "layer_norm_eps": 1e-12,
   "max_position_embeddings": 512,
@@ -45,4 +45,4 @@
   "type_vocab_size": 2,
   "use_cache": true,
   "vocab_size": 119547
-}
+}