Replace YAML keys from int to str

Replace YAML metadata integer keys with strings, as the Hub does not support integers.
See: https://github.com/huggingface/datasets/issues/5275

README.md

@@ -1,5 +1,4 @@
 ---
-pretty_name: FLUE
 annotations_creators:
 - crowdsourced
 - machine-generated
@@ -21,7 +20,7 @@ task_ids:
 - intent-classification
 - semantic-similarity-classification
 - sentiment-classification
-paperswithcode_id: null
+pretty_name: FLUE
 configs:
 - CLS
 - PAWS-X
@@ -38,8 +37,8 @@ dataset_info:
     dtype:
       class_label:
         names:
-          0: negative
-          1: positive
+          '0': negative
+          '1': positive
   - name: idx
     dtype: int32
   splits:
@@ -83,9 +82,9 @@ dataset_info:
     dtype:
       class_label:
         names:
-          0: contradiction
-          1: entailment
-          2: neutral
+          '0': contradiction
+          '1': entailment
+          '2': neutral
   - name: idx
     dtype: int32
   splits: