Fix sst2 dataset name (#1)

- Fix sst2 dataset name (b69f6aa1ec008505d4ff0ae5991aff230f940422)


Co-authored-by: Albert Villanova <albertvillanova@users.noreply.huggingface.co>

README.md

@@ -2,7 +2,7 @@
 language: en
 license: apache-2.0
 datasets:
-- sst-2
+- sst2
 ---