notify.gov landing page content phase 2 - links to other pages

[dmvancura]

https://docs.google.com/document/d/1fn3eHUjyJJcdZUnpqhp_q_sUddRZBK4pbs0SA-Zl7rU/edit?usp=sharing

revisit notify.gov homepage content to implement the phase 2 links to the about notify site section
dependency - about notify site section should go live with these changes

this would be a quick UI fix once the about notify content section is live and the phase 1 notify.gov homepage content is already up

two links are called out in the google doc where Cathy has commented on them