Hi Michael-
Thanks for reaching out! This is possible, in a few different ways.
Probably the best way to accomplish this is to use a plugin like W3 Total Cache to connect to an asset CDN. That way, not only will FontAwesome be loaded from a CDN, but all of your site’s static assets like JavaScript, CSS, and fonts will be served from the network.
That also has the added bonus of not requiring modifications to any theme files. Keep in mind that if you edit your theme files without creating a child theme, you’ll lose any of your modifications any time the theme is updated.
All of that being said, the files in which the FontAwesome Woff2 file is referenced are these:
boldgrid-gridone/inc/boldgrid-theme-framework/assets/css/font-awesome/font-awesome.css
boldgrid-gridone/inc/boldgrid-theme-framework/assets/css/font-awesome/font-awesome.min.css
boldgrid-gridone/inc/boldgrid-theme-framework/assets/scss/font-awesome/_path.scss
boldgrid-gridone/inc/boldgrid-theme-framework/includes/kirki/controls/fontawesome/font-awesome.css
boldgrid-gridone/inc/boldgrid-theme-framework/includes/kirki/controls/fontawesome/font-awesome.min.css
Search for fontawesome-webfont.woff2
to locate the references.