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

@@ -13,7 +13,6 @@ license:
 - cc0-1.0
 multilinguality:
 - multilingual
-pretty_name: British Library Books Genre
 size_categories:
 - 10K<n<100K
 - 1K<n<10K
@@ -28,6 +27,7 @@ task_ids:
 - multi-label-classification
 - language-modeling
 - masked-language-modeling
+pretty_name: British Library Books Genre
 configs:
 - annotated_raw
 - raw
@@ -43,8 +43,8 @@ dataset_info:
     dtype:
       class_label:
         names:
-          0: Fiction
-          1: Non-fiction
+          '0': Fiction
+          '1': Non-fiction
   splits:
   - name: train
     num_bytes: 187600
@@ -143,18 +143,18 @@ dataset_info:
     dtype:
       class_label:
         names:
-          0: Monograph
-          1: Serial
+          '0': Monograph
+          '1': Serial
   - name: created_at
     dtype: timestamp[s]
   - name: annotator_genre
     dtype:
       class_label:
         names:
-          0: Fiction
-          1: Can't tell
-          2: Non-fiction
-          3: The book contains both Fiction and Non-Fiction
+          '0': Fiction
+          '1': Can't tell
+          '2': Non-fiction
+          '3': The book contains both Fiction and Non-Fiction
   splits:
   - name: train
     num_bytes: 3583138
@@ -253,9 +253,9 @@ dataset_info:
     dtype:
       class_label:
         names:
-          0: Monograph
-          1: Serial
-          2: Monographic component part
+          '0': Monograph
+          '1': Serial
+          '2': Monographic component part
   - name: created_at
     dtype: string
   - name: annotator_genre