os: update todo about subsystem for windows

src/os/desktop.zig

@@ -40,7 +40,8 @@ pub fn launchedFromDesktop() bool {
 
             break :linux gio_pid == pid;
         },
-        //TODO: maybe find a way to check that
+
+        // TODO: This should have some logic to detect this. Perhaps std.builtin.subsystem
         .windows => false,
 
         else => @compileError("unsupported platform"),