Align label mapping with conll2003 dataset

Hi there, your model is using a default label mapping. Accept this PR to align the label mapping with the `conll2003` 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=conll2003)

config.json

@@ -10,28 +10,28 @@
   "hidden_dropout_prob": 0.1,
   "hidden_size": 128,
   "id2label": {
-    "0": "LABEL_0",
-    "1": "LABEL_1",
-    "2": "LABEL_2",
-    "3": "LABEL_3",
-    "4": "LABEL_4",
-    "5": "LABEL_5",
-    "6": "LABEL_6",
-    "7": "LABEL_7",
-    "8": "LABEL_8"
+    "0": "O",
+    "1": "B-PER",
+    "2": "I-PER",
+    "3": "B-ORG",
+    "4": "I-ORG",
+    "5": "B-LOC",
+    "6": "I-LOC",
+    "7": "B-MISC",
+    "8": "I-MISC"
   },
   "initializer_range": 0.02,
   "intermediate_size": 512,
   "label2id": {
-    "LABEL_0": 0,
-    "LABEL_1": 1,
-    "LABEL_2": 2,
-    "LABEL_3": 3,
-    "LABEL_4": 4,
-    "LABEL_5": 5,
-    "LABEL_6": 6,
-    "LABEL_7": 7,
-    "LABEL_8": 8
+    "O": 0,
+    "B-PER": 1,
+    "I-PER": 2,
+    "B-ORG": 3,
+    "I-ORG": 4,
+    "B-LOC": 5,
+    "I-LOC": 6,
+    "B-MISC": 7,
+    "I-MISC": 8
   },
   "layer_norm_eps": 1e-12,
   "max_position_embeddings": 512,
@@ -45,4 +45,4 @@
   "type_vocab_size": 2,
   "use_cache": true,
   "vocab_size": 30522
-}
+}