Fix language and license tag names and license tags

README.md

@@ -1,9 +1,9 @@
 ---
-languages:
+language:
 - en
-licenses:
-- Creative Commons Attribution-ShareAlike 4.0 International License
-- The Creative Commons Attribution-Noncommercial 4.0 International License
+license:
+- cc-by-sa-4.0
+- cc-by-nc-4.0
 multilinguality:
 - monolingual
 pretty_name: FTRACE