web/components: optically centre the issue state pill label
Inter's ascent/descent split isn't symmetric within the line box, so the
mathematically centred label sat visibly high — measured 7.25px of ink above
versus 10px below on 'Closed'. nudging the label alone by 1.5px balances it
without moving the icon or changing the pill's 28px height.
Signed-off-by: eti <eti@eti.tf>