fix: wrong -U8 in the menu item

Should be -U7
The source code is correct
The readme.txt is correct
[ci skip]

Author: GerryFerdinandus

source/code/main.lfm

@@ -401,7 +401,7 @@ object FormTrackerModify: TFormTrackerModify
         OnClick = MenuUpdateTorrentSortClick
       end
       object MenuUpdateRandomize: TMenuItem
-        Caption = '&Randomize the trackers list.(-U8)'
+        Caption = '&Randomize the trackers list.(-U7)'
         OnClick = MenuUpdateRandomizeClick
       end
     end