Update CSS @font-palette-values spec URLs (#17618)
Update CSS @font-palette-values spec URLs (#17618)

These can all use un-leveled https://drafts.csswg.org/css-fonts/ URLs
chrisdavidmills/browser-compat-data,chrisdavidmills/browser-compat-data,mdn/browser-compat-data,mdn/browser-compat-data