add dataset_info in dataset metadata

README.md

@@ -21,6 +21,17 @@ task_ids:
 - language-modeling
 - masked-language-modeling
 paperswithcode_id: bookcorpus
+dataset_info:
+  features:
+  - name: text
+    dtype: string
+  config_name: plain_text
+  splits:
+  - name: train
+    num_bytes: 4853859824
+    num_examples: 74004228
+  download_size: 1179510242
+  dataset_size: 4853859824
 ---
 
 # Dataset Card for BookCorpus
@@ -171,4 +182,4 @@ A data sheet for this dataset has also been created and published in [Addressing
 
 ### Contributions
 
-Thanks to [@lewtun](https://github.com/lewtun), [@richarddwang](https://github.com/richarddwang), [@lhoestq](https://github.com/lhoestq), [@thomwolf](https://github.com/thomwolf) for adding this dataset.
+Thanks to [@lewtun](https://github.com/lewtun), [@richarddwang](https://github.com/richarddwang), [@lhoestq](https://github.com/lhoestq), [@thomwolf](https://github.com/thomwolf) for adding this dataset.