add dataset_info in dataset metadata

README.md

@@ -19,6 +19,16 @@ task_categories:
 task_ids:
 - language-modeling
 paperswithcode_id: null
+dataset_info:
+  features:
+  - name: text
+    dtype: string
+  splits:
+  - name: train
+    num_bytes: 4418577129
+    num_examples: 40418260
+  download_size: 1507274412
+  dataset_size: 4418577129
 ---
 
 # Dataset Card for "librispeech_lm"
@@ -170,4 +180,4 @@ The data fields are the same among all splits.
 
 ### Contributions
 
-Thanks to [@lewtun](https://github.com/lewtun), [@jplu](https://github.com/jplu), [@thomwolf](https://github.com/thomwolf) for adding this dataset.
+Thanks to [@lewtun](https://github.com/lewtun), [@jplu](https://github.com/jplu), [@thomwolf](https://github.com/thomwolf) for adding this dataset.