Update V3-V4.md

Author: basicx-StrgV

migration_info/V3-V4.md

@@ -124,7 +124,7 @@ Therefore references to `WinGetData` need to be changed to `WinGetInfo`.
 - `Links` return type changed from `List<WinGetInfoEntry>` to `ReadOnlyCollection<WinGetLink>`
 - `AdminSetting`
   - Renamed to `AdminSettings`
-  - Return type changed from `List<WinGetInfoEntry>` to `ReadOnlyCollection<WinGetAdminOption>`
+  - Return type changed from `List<WinGetInfoEntry>` to `ReadOnlyCollection<WinGetAdminSetting>`
 
 ## WinGetSourceManager
 
@@ -221,6 +221,9 @@ public void ExportSourcesToFile(string file); // New
 
 ## WinGetAdminOption class
 
+The `WinGetAdminOption` class was renamed to `WinGetAdminSetting`, because ‘***setting***’ is used as the singular in winget.  
+Therefore references to `WinGetAdminOption` need to be changed to `WinGetAdminSetting`.
+
 This class can no longer be inherited because it was changed to sealed.
 
 ## WinGetInfoEntry class