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

@@ -17,7 +17,6 @@ task_categories:
 - text-classification
 task_ids:
 - multi-label-classification
-paperswithcode_id: null
 pretty_name: Discourse Analysis dataset
 tags:
 - discourse-analysis
@@ -31,12 +30,12 @@ dataset_info:
     dtype:
       class_label:
         names:
-          0: Argumentative
-          1: Descriptive
-          2: Dialogue
-          3: Informative
-          4: Narrative
-          5: Other
+          '0': Argumentative
+          '1': Descriptive
+          '2': Dialogue
+          '3': Informative
+          '4': Narrative
+          '5': Other
   splits:
   - name: train
     num_bytes: 1998930