Translations update from Weblate (#5026)

* [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.sk-sk.json

Co-authored-by: Lukáš Matula <lukas@gbely.net>
Co-authored-by: milkmaker <milkmaker@mailcow.de>

Co-authored-by: Peter <magic@kthx.at>
Co-authored-by: Lukáš Matula <lukas@gbely.net>