Pontoon: Update Chinese (zh-TW) localization of Test Pilot Website
Pontoon: Update Chinese (zh-TW) localization of Test Pilot Website

Localization authors:
- Pin-guang Chen <petercpg@mail.moztw.org>

lmorchard/testpilot,mozilla/idea-town-server,fzzzy/testpilot,lmorchard/idea-town-server,lmorchard/idea-town-server,chuckharmston/testpilot,mozilla/idea-town-server,mozilla/idea-town,mozilla/idea-town-server,fzzzy/testpilot,meandavejustice/testpilot,mozilla/idea-town,flodolo/testpilot,chuckharmston/testpilot,chuckharmston/testpilot,flodolo/testpilot,mozilla/idea-town-server,lmorchard/idea-town-server,lmorchard/idea-town,lmorchard/idea-town-server,mozilla/idea-town,meandavejustice/testpilot,chuckharmston/testpilot,lmorchard/idea-town,flodolo/testpilot,meandavejustice/testpilot,meandavejustice/testpilot,fzzzy/testpilot,lmorchard/testpilot,flodolo/testpilot,lmorchard/testpilot,mozilla/idea-town,lmorchard/testpilot,fzzzy/testpilot,lmorchard/idea-town,lmorchard/idea-town