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: DBRD
 annotations_creators:
 - found
 language_creators:
@@ -23,6 +22,7 @@ task_ids:
 - masked-language-modeling
 - sentiment-classification
 paperswithcode_id: dbrd
+pretty_name: DBRD
 dataset_info:
   features:
   - name: text
@@ -31,8 +31,8 @@ dataset_info:
     dtype:
       class_label:
         names:
-          0: neg
-          1: pos
+          '0': neg
+          '1': pos
   config_name: plain_text
   splits:
   - name: train