Update fonts path in DCR

**Note:** Coordinate this work with apps experience, who may have to make changes at the same time i.e. Android intercepts fonts requests in the app, so we may have to update the fonts paths that the app is listening for.

Point DCR-rendered pages to new fonts path

https://github.com/guardian/dotcom-rendering/blob/main/dotcom-rendering/src/lib/fonts-css.ts#L253

Update preload paths

https://github.com/guardian/dotcom-rendering/blob/6fa014f2ce44a58903f6fcc25881771d0f5770a9/dotcom-rendering/src/server/htmlPageTemplate.ts#L42-L56