Update files from the datasets library (from 1.18.0)

Release notes: https://github.com/huggingface/datasets/releases/tag/1.18.0

README.md

@@ -66,7 +66,7 @@ languages:
 - zh-HK
 - zh-TW
 licenses:
-- cc-by-nc-4-0
+- cc0-1-0
 multilinguality:
 - multilingual
 size_categories:
@@ -348,7 +348,7 @@ The dataset consists of people who have donated their voice online.  You agree t
 
 ### Licensing Information
 
-[More Information Needed] 
+Public Domain, [CC-0](https://creativecommons.org/share-your-work/public-domain/cc0/)
 
 ### Citation Information