Preload key requests

Hi,

Got this comment on google speed test. Wanted to ask where i add`<link rel=preload> in order for the menu not to slow the site.

https://www.slotmachinesonline.co/wp-content/plugins/wp-responsive-menu/assets/fonts/wprmenu.ttf?p8o4s0

Thank you
Mark

The page I need help with: [log in to see the link]