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

@@ -11,7 +11,6 @@ license:
 - cc-by-sa-3.0
 - mit
 - other
-license_details: Open Portion of the American National Corpus
 multilinguality:
 - monolingual
 size_categories:
@@ -25,6 +24,7 @@ task_ids:
 - multi-input-text-classification
 paperswithcode_id: multinli
 pretty_name: Multi-Genre Natural Language Inference
+license_details: Open Portion of the American National Corpus
 dataset_info:
   features:
   - name: promptID
@@ -49,9 +49,9 @@ dataset_info:
     dtype:
       class_label:
         names:
-          0: entailment
-          1: neutral
-          2: contradiction
+          '0': entailment
+          '1': neutral
+          '2': contradiction
   splits:
   - name: train
     num_bytes: 410211586