Update README.md

Filtered version of the LLM-PBE/enron-email dataset.
Removed 'to' and 'cc' email headers
Filtered for english language emails only.
Filtered for <512 token length emails only.

README.md

@@ -14,4 +14,6 @@ configs:
   data_files:
   - split: train
     path: data/train-*
----
+language:
+- en
+---