l10n: ko.po: Update Korean translation

Update the Korean translation and change the team leader to Gwan-gyeong
Mun.

Signed-off-by: Gwan-gyeong Mun <elongbug@gmail.com>
Signed-off-by: Changwoo Ryu <cwryu@debian.org>
Reviewed-by: Gwan-gyeong Mun <elongbug@gmail.com>

Author: changwoo

po/TEAMS

@@ -35,8 +35,8 @@ Members:	Stefano Lattarini <stefano.lattarini AT gmail.com>
 
 Language:	ko (Korean)
 Repository:	https://github.com/git-l10n-ko/git-l10n-ko/
-Leader:		Changwoo Ryu <cwryu@debian.org>
-Members:	Gwan-gyeong Mun <elongbug@gmail.com>
+Leader:		Gwan-gyeong Mun <elongbug@gmail.com>
+Members:	Changwoo Ryu <cwryu@debian.org>
 		Sihyeon Jang <uneedsihyeon@gmail.com>
 
 Language:	pt_PT (Portuguese - Portugal)