Remove config names as yaml keys (#4367)

* validate YAML part

* fix bad YAML keys

* don't have config names as yaml keys

* style

* Remove hacking license tags when mirroring datasets on the Hub

* fix test

* fix style

* more fixes

* remove dots in QA column mapping keys

Commit from https://github.com/huggingface/datasets/commit/3f3013441e4af9bf4efa752b5e6e184a588b7a80

README.md

@@ -5,10 +5,8 @@ language_creators:
 - expert-generated
 - found
 languages:
-  en:
-  - en
-  zh:
-  - zh
+- en
+- zh
 licenses:
 - unknown
 multilinguality:
@@ -23,6 +21,9 @@ task_ids:
 - closed-domain-qa
 paperswithcode_id: null
 pretty_name: MedDialog
+configs:
+- en
+- zh
 ---
 
 # Dataset Card for MedDialog