Documentation/ko_KR: update maintainer information

Maintainer informations of Documentation/ko_KR is outdated. This commit
update the informations to the latest ones.
Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/ko_KR/HOWTO

 NOTE:
 This is a version of Documentation/HOWTO translated into korean
-This document is maintained by minchan Kim <minchan.kim@gmail.com>
+This document is maintained by Minchan Kim <minchan@kernel.org>
 If you find any difference between this document and the original file or
 a problem with the translation, please contact the maintainer of this file.
 
@@ -14,7 +14,7 @@ try to update the original English file first.
 Documentation/HOWTO
 의 한글 번역입니다.
 
-역자： 김민찬 <minchan.kim@gmail.com>
+역자： 김민찬 <minchan@kernel.org>
 감수： 이제이미 <jamee.lee@samsung.com>
 ==================================
 

Documentation/ko_KR/stable_api_nonsense.txt

 NOTE:
 This is a version of Documentation/stable_api_nonsense.txt translated
 into korean
-This document is maintained by barrios <minchan.kim@gmail.com>
+This document is maintained by Minchan Kim <minchan@kernel.org>
 If you find any difference between this document and the original file or
 a problem with the translation, please contact the maintainer of this file.
 
@@ -15,7 +15,7 @@ try to update the original English file first.
 Documentation/stable_api_nonsense.txt
 의 한글 번역입니다.
 
-역자： 김민찬 <minchan.kim@gmail.com>
+역자： 김민찬 <minchan@kernel.org>
 감수： 이제이미 <jamee.lee@samsung.com>
 ==================================