Update packages/bpk-mixins/src/mixins/_typography.scss
Update packages/bpk-mixins/src/mixins/_typography.scss

Co-authored-by: Ollie Curtis <11cefe734d9272cea7751aaba076bb5a36938a05@users.noreply.github.com>
Skyscanner/backpack,Skyscanner/backpack,Skyscanner/backpack