Fix language and license tag names (#1)

- Fix language and license tag names (c33bacc56b49dd56f56f6fdb4009bee2845d3fd2)

README.md

@@ -1,11 +1,10 @@
 ---
-pretty_name: qasper-squad
 annotations_creators:
 - expert-generated
 language_creators:
 - expert-generated
-languages:
-- en-US
+language:
+- en
 multilinguality:
 - monolingual
 size_categories:
@@ -14,6 +13,9 @@ task_categories:
 - question-answering
 task_ids:
 - closed-domain-qa
+pretty_name: qasper-squad
+language_bcp47:
+- en-US
 ---
 
 # Quasper into squad version