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

- Librarian Bot: Add language metadata for dataset (552afb1cea5aca9c016239089411a786f54092cf)


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

README.md

@@ -1,3 +1,7 @@
+---
+language:
+- en
+---
 Total tokens in matching entries: 275_639_417
 
 Average tokens per entry: 2756.39