Translations update from Weblate (#4960)

* [Web] Updated lang.zh-cn.json

Co-authored-by: milkmaker <milkmaker@mailcow.de>
Co-authored-by: 雨 <luotianyi@luotianyi.me>

* [Web] Updated lang.en-gb.json

Co-authored-by: Peter <magic@kthx.at>

* [Web] Updated lang.de-de.json

Co-authored-by: Peter <magic@kthx.at>

* [Web] Updated lang.it-it.json

Co-authored-by: Stefano <stefano.vassena@gmail.com>
Co-authored-by: milkmaker <milkmaker@mailcow.de>

Co-authored-by: 雨 <luotianyi@luotianyi.me>
Co-authored-by: Peter <magic@kthx.at>
Co-authored-by: Stefano <stefano.vassena@gmail.com>