Add example of dataset with configuration name to README

README.md

@@ -262,6 +262,12 @@ See sample configs in [configs](configs) folder or [examples](examples) for quic
     - path: vicgalle/alpaca-gpt4
       type: alpaca # format from earlier
   
+  # huggingface repo with specific configuration/subset
+  datasets:
+    - path: EleutherAI/pile
+      name: enron_emails
+      type: completion # format from earlier
+
   # local
   datasets:
     - path: json