[2/n] [landing] add team to footer component

Summary:
add team link to footer

Test Plan: click the footer link, make sure it goes to team page

Reviewers: atul, ashoat

Reviewed By: atul, ashoat

Subscribers: ashoat, palys-swm, Adrian, karol-bisztyga, boristopalov

Differential Revision: https://phabricator.ashoat.com/D2749