Fix language and license tag names (#1)

- Fix language and license tag names (b79023ba6cc3ae2807985a9c7d0f3803bc6c81d8)

README.md

@@ -3,10 +3,10 @@ annotations_creators:
 - expert-generated
 language_creators:
 - expert-generated
-languages:
+language:
 - en
-licenses:
-- other-CC Public Domain Mark 1.0
+license:
+- other
 multilinguality:
 - monolingual
 pretty_name: UK Selective Web Archive Classification Dataset
@@ -133,7 +133,7 @@ The dataset comprises a manually curated selective archive produced by UKWA whic
 
 ### Licensing Information
 
-[Needs More Information]
+Creative Commons Public Domain Mark 1.0.
 
 ### Citation Information