fix: typo in StunClientEvent

[lehmanju]

Fixes #51

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.73%. Comparing base (23390a3) to head (b37ecf7).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #54      +/-   ##
==========================================
- Coverage   96.05%   95.73%   -0.32%     
==========================================
  Files          58       58              
  Lines        2914     2814     -100     
==========================================
- Hits         2799     2694     -105     
- Misses        115      120       +5     

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[sancane]

Thanks so much for your contribution!