fix(noUnusedFunctionParameters): fix typo in documentation code example

[printfn]

Summary

Fixing a typo in the documentation code example

Test Plan

Manually checked that it's correct

[codspeed-hq]

CodSpeed Performance Report

Merging #3065 will not alter performance

_{Comparing printfn:documentation-typo (c52c941) with main (0a6e770)}

Summary

✅ 92 untouched benchmarks