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

- Librarian Bot: Add language metadata for dataset (f1a7987a1b40bc117e3bd7764e1d852f5e46eebc)


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

README.md

@@ -1,4 +1,6 @@
 ---
+language:
+- en
 license: mit
 ---
 This is the English version of the Gutenberg Dialogue Dataset.