Translations update from Weblate (#5472)

* [Web] Updated lang.cs-cz.json

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

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

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

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