School profile page (new): Increase text size and line height

[basiacoulter]

• This pertains to the new school profile page: https://durhamschoolnavigator.org/#/school-new/247/
• Increase text size to at least 16px, and line height of 24px (or the corresponding values if expressed in other units; the ratio of text size to line height should be 1/1.5).
• Consider if this needs to be a site-wide adjustment.

[basiacoulter]

PR submitted: https://github.com/codefordurham/school-navigator/pull/404