[e.cash] Revert to original copy in /About hero

Summary: "innovation" will be replaced with the original copy: "new technology". It was put in to be less repetitive but is ultimately worse.

Test Plan: review /about

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D18728