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/spectacle.md

@@ -0,0 +1,16 @@
+# spectacle
+
+> KDE의 스크린샷 유틸리티.
+> 더 많은 정보: <https://manned.org/spectacle>.
+
+- 전체 데스크톱의 스크린샷 캡처:
+
+`spectacle`
+
+- 활성 창의 스크린샷 캡처:
+
+`spectacle --activewindow`
+
+- 특정 영역의 스크린샷 캡처:
+
+`spectacle --region`