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

@@ -9,13 +9,13 @@ license:
 - apache-2.0
 multilinguality:
 - monolingual
+size_categories:
+- 10K<n<100K
 source_datasets:
 - original
 task_categories:
 - text-classification
 task_ids: []
-size_categories:
-- 10K<n<100K
 pretty_name: Headline Grouping (HLGD)
 tags:
 - headline-grouping
@@ -25,16 +25,16 @@ dataset_info:
     dtype:
       class_label:
         names:
-          0: 0
-          1: 1
-          2: 2
-          3: 3
-          4: 4
-          5: 5
-          6: 6
-          7: 7
-          8: 8
-          9: 9
+          '0': 0
+          '1': 1
+          '2': 2
+          '3': 3
+          '4': 4
+          '5': 5
+          '6': 6
+          '7': 7
+          '8': 8
+          '9': 9
   - name: headline_a
     dtype: string
   - name: headline_b
@@ -51,8 +51,8 @@ dataset_info:
     dtype:
       class_label:
         names:
-          0: same_event
-          1: different_event
+          '0': same_event
+          '1': different_event
   splits:
   - name: train
     num_bytes: 6447212