Merge pull request #1985 from partrita/master

Korean translation!

Author: marioidival

.github/workflows/rbe.yml

@@ -3,7 +3,7 @@ on: [push, pull_request]
 
 env:
   # Update the language picker in index.hbs to link new languages.
-  LANGUAGES: ja zh es
+  LANGUAGES: ja zh es ko
   MDBOOK_VERSION: 0.5.1
 
 jobs: