Pontoon: Update Korean (ko) localization of Firefox for Android

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

mozilla-mobile/fenix/app/src/main/res/values-ko/strings.xml

@@ -3145,10 +3145,10 @@
     <!-- Messages explaining how to exit fullscreen mode -->
     <!-- Message shown to explain how to exit fullscreen mode when gesture navigation is enabled. -->
     <!-- Localisation note: this text should be as short as possible, max 68 chars -->
-    <string name="exit_fullscreen_with_gesture_short">종료하려면, 맨 위에서 아래로 드래그하고 뒤로가기 제스처를 사용하세요</string>
+    <string name="exit_fullscreen_with_gesture_short">전체 화면에서 나가려면, 화면 상단를 아래로 드래그하고 뒤로가기 제스처를 사용하세요</string>
     <!-- Message shown to explain how to exit fullscreen mode when using back button navigation. -->
     <!-- Localisation note: this text should be as short as possible, max 68 chars -->
-    <string name="exit_fullscreen_with_back_button_short">종료하려면, 맨 위에서 아래로 드래그하고 뒤로가기를 누르세요</string>
+    <string name="exit_fullscreen_with_back_button_short">전체 화면에서 나가려면, 화면 상단를 아래로 드래그하고 뒤로가기를 누르세요</string>
 
     <!-- Beta Label Component !-->
     <!-- Text shown as a label or tag to indicate a feature or area is still undergoing active development. Note that here "Beta" should not be translated, as it is used as an icon styled element. -->