rename configs to config_name

README.md

@@ -20,9 +20,6 @@ task_ids:
 - multiple-choice-qa
 paperswithcode_id: headqa
 pretty_name: HEAD-QA
-configs:
-- en
-- es
 dataset_info:
 - config_name: es
   features:
@@ -92,6 +89,9 @@ dataset_info:
     num_examples: 1366
   download_size: 79365502
   dataset_size: 2828236
+config_names:
+- en
+- es
 ---
 
 # Dataset Card for HEAD-QA