Update Russian translation
I ran: $ meson . simple-scan-pot $ meson . simple-scan-update-po $ msgmerge --update ru.po simple-scan.pot $ git commit po/ru.po
Some improvements were made by Andrey Grigoriev: https://abf.io/import/simple-scan/commit/af30ba207f1d63d14bff8e121fb0e5824c816aef They were picked and he was added to credits.
- just regenerated po files of other languages to sync them with current code without making changes in them