Pontoon/AMO Frontend: Update Korean (ko)

Co-authored-by: Kim YoungCheon <circcc@gmail.com> (ko)

Author: mozilla-pontoon

locale/ko/LC_MESSAGES/amo.po

@@ -1600,7 +1600,7 @@ msgstr "%(thisPage)s / %(totalPages)s 페이지"
 
 #: src/amo/components/PermissionsCard/index.js:107
 msgid "Required permissions:"
-msgstr "필요한 권한:"
+msgstr "필수 권한:"
 
 #: src/amo/components/PermissionsCard/index.js:117
 msgid "Optional permissions:"