[TextExtractor]Properly initialize PreferredLanguage (#23095)

src/settings-ui/Settings.UI.Library/PowerOcrProperties.cs

@@ -11,6 +11,7 @@ namespace Microsoft.PowerToys.Settings.UI.Library
         public PowerOcrProperties()
         {
             ActivationShortcut = new HotkeySettings(true, false, false, true, 0x54); // Win+Shift+T
+            PreferredLanguage = string.Empty;
         }
 
         public HotkeySettings ActivationShortcut { get; set; }