Font display audit never says what display value to use

[patrickhulce]

Summary

Pointed out in #6628 (comment), we just say to "Leverage the font-display CSS feature" and the doc we link to is from 2016 just talking about the feature, not an opinionated performance guide to using font-display. In fact, the example uses auto which is not at all what we want.

[cdeath]

also worthy to mention that the example uses Google Fonts assets but Google Fonts itself does not implement this optimization on their stylesheets

[Lofesa]

also worthy to mention that the example uses Google Fonts assets but Google Fonts itself does not implement this optimization on their stylesheets

Google Fonts now admit &display=swap (or wahtever valid value) parameter in the url.
Try this url