Fix language and license tag names (#1)

- Fix language and license tag names (4c9d208fc576afed7f81aee4ecd0e14f5c2f60ae)

README.md

@@ -3,10 +3,10 @@ annotations_creators:
 - crowdsourced
 language_creators:
 - crowdsourced
-languages:
+language:
 - en
-licenses:
-- apache-2-0
+license:
+- apache-2.0
 multilinguality:
 - monolingual
 size_categories:
@@ -17,7 +17,6 @@ task_categories:
 - text-classification
 task_ids:
 - sentiment-classification
-paperswithcode_id: null
 pretty_name: Amazon Review Polarity
 ---