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

@@ -16,7 +16,6 @@ source_datasets:
 task_categories:
 - text-classification
 task_ids: []
-paperswithcode_id: null
 pretty_name: HateSpeechPortuguese
 tags:
 - hate-speech-detection
@@ -28,8 +27,8 @@ dataset_info:
     dtype:
       class_label:
         names:
-          0: no-hate
-          1: hate
+          '0': no-hate
+          '1': hate
   - name: hatespeech_G1
     dtype: string
   - name: annotator_G1