translation change in Mail as the project is blocked in Weblate

Description

The "Finish" button was wrongly translated in Mail and the project is under maintenance in WebLate this is why I'm changing it in GitLab directly.

Screenshots

Technical details

Tests

Issues

10 commandments of code review

👪 ❤️ https://gitlab.e.foundation/groups/e/-/wikis/contribute/development-processes/code-review-guidelines

Summary by CodeRabbit

• Style
  • Updated the French translation for the account setup finish button to "Terminer."