<link rel='stylesheet' href='https://sofuwa.ru/wp-content/themes/svarog/assets/css/all.css' type='text/css' media='all' crossorigin="anonymous" />
<link rel='stylesheet' href='https://use.fontawesome.com/releases/v5.13.0/css/all.css' type='text/css' media='all' crossorigin="anonymous" />
href='https://sofuwa.ru/wp-content/themes/svarog/assets/css/font-awesome.css
илиhref='https://sofuwa.ru/wp-content/themes/svarog/assets/css/font-awesome.min.css
это уже на ваш выбор