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

@@ -1,5 +1,4 @@
 ---
-pretty_name: IndoNLI
 annotations_creators:
 - expert-generated
 - crowdsourced
@@ -20,6 +19,7 @@ task_categories:
 task_ids:
 - natural-language-inference
 paperswithcode_id: indonli
+pretty_name: IndoNLI
 dataset_info:
   features:
   - name: premise
@@ -30,9 +30,9 @@ dataset_info:
     dtype:
       class_label:
         names:
-          0: entailment
-          1: neutral
-          2: contradiction
+          '0': entailment
+          '1': neutral
+          '2': contradiction
   config_name: indonli
   splits:
   - name: train