[landing] updated layout of team members wrapper

Summary:
updated layout of team member wrapper by doubling the row-gap property and adding a max-width

Linear Task: ENG-1506

Depends: D5295

Test Plan:
Please review the screenshots to see the before and after of the changes I made:

Before:

After:

Please note for this image I added the red border just to highlight the size of max-width:

Reviewers: atul, ashoat, rohan, abosh

Reviewed By: atul, ashoat, rohan

Subscribers: ashoat, tomek, atul, abosh

Differential Revision: https://phab.comm.dev/D5296