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:
 - intent-classification
-paperswithcode_id: null
 pretty_name: Structured Argument Extraction for Korean
 dataset_info:
   features:
@@ -29,12 +28,12 @@ dataset_info:
     dtype:
       class_label:
         names:
-          0: yes/no
-          1: alternative
-          2: wh- questions
-          3: prohibitions
-          4: requirements
-          5: strong requirements
+          '0': yes/no
+          '1': alternative
+          '2': wh- questions
+          '3': prohibitions
+          '4': requirements
+          '5': strong requirements
   splits:
   - name: train
     num_bytes: 2885167