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

@@ -6,7 +6,7 @@ language_creators:
 languages:
 - en
 licenses:
-- gpl-3-0
+- gpl-3.0
 multilinguality:
 - monolingual
 size_categories:
@@ -18,17 +18,14 @@ task_categories:
 - fill-mask
 - text-retrieval
 task_ids:
-  all:
-  - dialogue-modeling
-  - utterance-retrieval
-  happy:
-  - dialogue-modeling
-  - utterance-retrieval
-  offmychest:
-  - dialogue-modeling
-  - utterance-retrieval
+- dialogue-modeling
+- utterance-retrieval
 paperswithcode_id: pec
 pretty_name: Persona-Based Empathetic Conversational
+configs:
+- all
+- happy
+- offmychest
 ---
 
 # Dataset Card for PEC