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

- Librarian Bot: Add language metadata for dataset (cd9b42b22457583582e5b6e9d89fda22efde7b2c)


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

README.md

@@ -1,3 +1,7 @@
+---
+language:
+- en
+---
 100k subsample from `JeanKaddour/minipile`
 
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