[e.cash] Add weglot exclusion classname

Summary: The translator is messing with the countdown numbers. Need to add this classname so I can tell weglot to ignore this block

Test Plan: nothing should change here. The countdown should behave better on the live site when you change the language though

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Subscribers: Fabien

Differential Revision: https://reviews.bitcoinabc.org/D14632