common/s*: add and update Korean translation (#14666)

* common/s*: add and update Korean translation

* scamper: fix typo

* Update pages.ko/common/simplehttpserver.md

Co-authored-by: Chooooo <contact@choo.ooo>

* Update pages.ko/common/steamcmd.md

Co-authored-by: Chooooo <contact@choo.ooo>

---------

Co-authored-by: Sebastiaan Speck <shem.speck@gmail.com>
Co-authored-by: Chooooo <contact@choo.ooo>

pages.ko/common/sup.md

@@ -0,0 +1,9 @@
+# sup
+
+> 현재 디렉토리에서 RSS 피드를 관리.
+> 같이 보기: `lb`.
+> 더 많은 정보: <https://github.com/LukeSmithxyz/lb>.
+
+- RSS 피드에 기사 추가:
+
+`sup {{경로/대상/파일.html}}`