Update README.md to include ISO Codes metadata for available languages (#2)

- Update README.md to include ISO Codes metadata for available languages (ba726a59e3655f925f2e8dccc3ec547336d0469d)


Co-authored-by: Matthew A Hernandez <[email protected]>

README.md

@@ -5,4 +5,7 @@ task_categories:
 - reinforcement-learning
 size_categories:
 - 10K<n<100K
+language:
+- en
+- vi
 ---