adjust pagination tap target size

[timelsass]

Mentioned as part of user feedback, the tap target size for tablets and mobile should be increased for pagination. The bulk of the accessibility work will probably take place in #63, but wanted to be sure the user knew this will be updated.

For reference I think this repo should follow the fundamentals guide for accessible styles provided by Google.

The tap target size should give a surface area around 9mm to avoid finger padding collisions, Ideally something 48px x 48px or larger. I think an increase in the link/span padding for the pagination should work.