[Cashtab] Show one more character on token urls

Summary: This means that stakedXec.com is rendered instead of stakedXec.co...

Test Plan:
npm test, screenshot

before

after

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Subscribers: Fabien

Differential Revision: https://reviews.bitcoinabc.org/D17442