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: 3i4K
 dataset_info:
   features:
@@ -25,13 +24,13 @@ dataset_info:
     dtype:
       class_label:
         names:
-          0: fragment
-          1: statement
-          2: question
-          3: command
-          4: rhetorical question
-          5: rhetorical command
-          6: intonation-dependent utterance
+          '0': fragment
+          '1': statement
+          '2': question
+          '3': command
+          '4': rhetorical question
+          '5': rhetorical command
+          '6': intonation-dependent utterance
   - name: text
     dtype: string
   splits: