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

@@ -19,7 +19,6 @@ task_categories:
 task_ids:
 - sentiment-classification
 - multi-label-classification
-paperswithcode_id: null
 pretty_name: Dutch Social Media Collection
 dataset_info:
   features:
@@ -71,9 +70,9 @@ dataset_info:
     dtype:
       class_label:
         names:
-          0: neg
-          1: neu
-          2: pos
+          '0': neg
+          '1': neu
+          '2': pos
   config_name: dutch_social
   splits:
   - name: train