[landing] address keybase comparison touch ups
Summary:
resolves the following keybase comparison copy:
https://linear.app/comm/issue/ENG-4624/keybase-comparison
Depends on D8784
Test Plan:
Please see the screenshots:
Reviewers: atul, kamil, ashoat
Reviewed By: ashoat
Subscribers: ashoat, tomek
Differential Revision: https://phab.comm.dev/D8785