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

@@ -5,8 +5,6 @@ language_creators:
 - found
 language:
 - ro
-language_bcp47:
-- ro-MD
 license:
 - cc-by-4.0
 multilinguality:
@@ -21,6 +19,8 @@ task_ids:
 - topic-classification
 paperswithcode_id: moroco
 pretty_name: 'MOROCO: The Moldavian and Romanian Dialectal Corpus'
+language_bcp47:
+- ro-MD
 dataset_info:
   features:
   - name: id
@@ -29,12 +29,12 @@ dataset_info:
     dtype:
       class_label:
         names:
-          0: culture
-          1: finance
-          2: politics
-          3: science
-          4: sports
-          5: tech
+          '0': culture
+          '1': finance
+          '2': politics
+          '3': science
+          '4': sports
+          '5': tech
   - name: sample
     dtype: string
   config_name: moroco