[e.cash] Add id to weglot script

Summary: Adding an ID to the inline weglot script as required from next to fix build error

Test Plan:
preview the site and check it looks good
and then npm run build to check build runs

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D14300