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

@@ -2,15 +2,14 @@
 annotations_creators:
 - crowdsourced
 - expert-generated
-language:
-- en
 language_creators:
 - found
+language:
+- en
 license:
 - cc-by-4.0
 multilinguality:
 - monolingual
-pretty_name: HyperpartisanNewsDetection
 size_categories:
 - 1M<n<10M
 source_datasets:
@@ -18,7 +17,7 @@ source_datasets:
 task_categories:
 - text-classification
 task_ids: []
-paperswithcode_id: null
+pretty_name: HyperpartisanNewsDetection
 tags:
 - bias-classification
 dataset_info:
@@ -56,11 +55,11 @@ dataset_info:
     dtype:
       class_label:
         names:
-          0: right
-          1: right-center
-          2: least
-          3: left-center
-          4: left
+          '0': right
+          '1': right-center
+          '2': least
+          '3': left-center
+          '4': left
   splits:
   - name: train
     num_bytes: 2805711609