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

@@ -4,12 +4,10 @@ annotations_creators:
 language_creators:
 - crowdsourced
 languages:
-  de:
-  - de
-  en:
-  - en
+- de
+- en
 licenses:
-- cc-by-sa-4-0
+- cc-by-sa-4.0
 multilinguality:
 - monolingual
 size_categories:
@@ -22,6 +20,9 @@ task_ids:
 - rdf-to-text
 paperswithcode_id: null
 pretty_name: Enriched WebNLG
+configs:
+- de
+- en
 ---
 
 # Dataset Card for WebNLG