traditional chinese translation for module "appupdate"

[azhon]

I have already added zh-rTW translation

[WilliamFromTW]

hi there, this app is awesome , thanks. the previous commit is only update for "app" directory , so i update string.xml in "appupdate" directory , contents in string.xml in "app" and "appupdate" is not the same , maybe this commit is not necessary if you had confirmed, thanks again.

[jayanthjay8055]

gh pr checkout 123