Fix voucher limit

[dominik-zeglen]

Resolves #270

Pull Request Checklist

1. All visible strings are translated with proper context.
2. All data-formatting is locale-aware (dates, numbers, and so on).
3. Translated strings are extracted to .pot file.
4. Number of API calls is optimized.
5. The changes are tested.
6. Type definitions are up to date.
7. Changes are mentioned in the changelog.

[codecov]

Codecov Report

Merging #271 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #271      +/-   ##
==========================================
- Coverage   74.01%   74.01%   -0.01%     
==========================================
  Files         605      605              
  Lines        6492     6491       -1     
  Branches     1065     1064       -1     
==========================================
- Hits         4805     4804       -1     
  Misses       1501     1501              
  Partials      186      186

Impacted Files	Coverage Δ
...c/discounts/components/VoucherList/VoucherList.tsx	84.61% <100%> (-0.57%)	⬇️

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