add Korean translation

README.md

@@ -38,6 +38,7 @@ On other languages
   * [Brazilian Portuguese](https://github.com/mauri870/linux-insides)
   * [Chinese](https://github.com/MintCN/linux-insides-zh)
   * [Japanese](https://github.com/tkmru/linux-insides-ja)
+  * [Korean](https://github.com/junsooo/linux-insides-ko)
   * [Russian](https://github.com/proninyaroslav/linux-insides-ru)
   * [Spanish](https://github.com/leolas95/linux-insides)
   * [Turkish](https://github.com/ayyucedemirbas/linux-insides_Turkish)

contributors.md

@@ -123,3 +123,4 @@ Thank you to all contributors:
 * [Takuya Yamamoto](https://github.com/tkyymmt)
 * [Dragonly](https://github.com/dragonly)
 * [Blameying](https://github.com/Blameying)
+* [Junsoo Lee](https://github.com/junsooo)