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

@@ -14,7 +14,7 @@ source_datasets:
 size_categories:
 - 10K<n<100K
 licenses:
-- CC-BY-SA-4-0
+- CC-BY-SA-4.0
 paperswithcode_id: null
 pretty_name: GoogleWellformedQuery
 ---