[e.cash] Fix scroll on 3d logo

Summary:
The 3d logo in the hero section was preventing page scroll if the mouse was over it.
Modified the file to prevent this

Test Plan: preview site and check if you can scroll the page while hovering on the 3d logo

Reviewers: #bitcoin_abc, bytesofman

Reviewed By: #bitcoin_abc, bytesofman

Subscribers: bytesofman

Differential Revision: https://reviews.bitcoinabc.org/D18672