[FX-1748] Fix line-height in ReadMore component

[anandaroop]

https://artsyproduct.atlassian.net/browse/FX-1748

This simply updates ReadMore to use font size 3 instead of 3t (i.e. the tightly-spaced variant)

Phone

Tablet

Background

I was curious why this component was spec'd with 3t size to begin with, so I did the Github and Jira archaeology to find:

• https://github.com/artsy/emission/pull/1654, which implements:

• https://artsyproduct.atlassian.net/browse/PURCHASE-1139, which includes the comp:

• https://app.zeplin.io/project/5ab94282c124db8d58365b47/screen/5cdb43f2b4655d1e7436ca1a

From there I can see that this component was 16/24 serif which does in fact map to size 3

I figure this was an oversight that just persisted till now, so I think this change should be good to go, and @jeffreytr agrees!

[ashleyjelks]

Great find!

[artsyit]

:rocket: PR was released in v1.21.41 :rocket: