[chore][landing] bump fortawesome package

Summary: bumped icon package using yarn upgrade-interactive

Test Plan: cleaninstalled, ran landing and checked all components using the fortawesome package. Everything still worked as expected

Reviewers: atul

Reviewed By: atul

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

Differential Revision: https://phabricator.ashoat.com/D3936