Fix typo in code sample

[Pankraty]

Code sample from the documentation has a typo making it uncompilable.

[CLAassistant]

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✅ michaelstaib
❌ Pankraty
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.38%. Comparing base (723733e) to head (c0670c7).
Report is 1 commits behind head on main.

❗ Current head c0670c7 differs from pull request most recent head 62815c4. Consider uploading reports for the commit 62815c4 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7065      +/-   ##
==========================================
+ Coverage   77.27%   77.38%   +0.10%     
==========================================
  Files        2632     2627       -5     
  Lines      131349   131152     -197     
==========================================
- Hits       101505   101490      -15     
+ Misses      29844    29662     -182     

Flag	Coverage Δ
unittests	77.38% <ø> (+0.10%)	⬆️

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[michaelstaib]

Thanks for contributing.