fix: unselectable `zhTW` translation option

[PatrikKozak]

Description

fix:

• Updates Taiwanese translation from zh-tw to zhTW

• [x] I have read and understand the CONTRIBUTING.md document in this repository.

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)

Checklist:

• [x] Existing test suite passes locally with my changes

[jacobsfletch]

@PatrikKozak can you pick back up on this?