Update Ukrainian translation for 2.1 branch
Update Ukrainian translation for master branch
covers edge case for Luhn
Merge branch '2.1'

* 2.1:
  Update Ukrainian translation for 2.1 branch
merged branch vitaliytv/master (PR #6590)

This PR was merged into the master branch.

Commits
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4bf82e0 Update Ukrainian translation for master branch

Discussion
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[Validator] Update Ukrainian translation for master branch