Small polish translation update

[Floppy]

Checklist

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Warnings

• This PR will change existing database contents.
• This PR introduces a breaking change to existing installations.

Summary

Linked issues

Description of changes

[codeclimate]

Code Climate has analyzed commit f993dbb and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 82.8% (0.0% change).

View more on Code Climate.