update v5 sample readme

[Geal]

follow up to d90accd

[codspeed-hq]

CodSpeed Performance Report

Merging #243 will not alter performance

_{Comparing geal/update-v5-readme-json (463ac2d) with v5 (e59f41d)}

Summary

✅ 12 untouched benchmarks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.92%. Comparing base (d90accd) to head (463ac2d).
Report is 4 commits behind head on v5.

Additional details and impacted files

@@            Coverage Diff             @@
##               v5     #243      +/-   ##
==========================================
- Coverage   68.96%   68.92%   -0.04%     
==========================================
  Files          25       25              
  Lines        5922     5922              
==========================================
- Hits         4084     4082       -2     
- Misses       1838     1840       +2     

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[divarvel]

oh sorry i missed it and fixed it in #244

it looks a bit different because of flaky coverage checks