Update client.zh_TW.yml (PR #14443)

Update primary_label of email for i18n zh_TW.

The “primary” in email is “主要” not “一級”.

Just change the text in UI. It should it have to do any test.

GitHub

CLA assistant check
Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
You have signed the CLA already but the status is still pending? Let us recheck it.

Hi, thank you for contributing! :smiley: We’re accepting changes to translations through https://translate.discourse.org/ Please submit your improvement there.