Librarian Bot: Add language metadata for dataset (#2)

- Librarian Bot: Add language metadata for dataset (adae3b5d448f41e4218b893140ad4d95a4719103)


Co-authored-by: Librarian Bot (Bot) <librarian-bot@users.noreply.huggingface.co>

README.md

@@ -1,4 +1,6 @@
 ---
+language:
+- en
 tags:
 - books
 ---