Consider snapping line heights to 4px scale

[jonathantneal]

The current --line-height-2xs and --line-height-4xl tokens do not snap to the 4px scale used by all other line height tokens.

:where(:root) {
  --line-height-2xs: 14px;
  --line-height-4xl: 70px;
}

I recommend these tokens, if they are remaining, be snapped to the 4px scale.

:where(:root) {
  --line-height-2xs: 12px;
  --line-height-4xl: 72px;
}