chore: ensure no-cov is set for benchmarks

[bdraco]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 41.40%. Comparing base (28f9fa5) to head (139a4c2).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #45   +/-   ##
=======================================
  Coverage   41.40%   41.40%           
=======================================
  Files           9        9           
  Lines         500      500           
  Branches       42       42           
=======================================
  Hits          207      207           
  Misses        293      293           

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[codspeed-hq]

CodSpeed Performance Report

Merging #45 will improve performances by 55.76%

_{Comparing no_cov_benchmarks (139a4c2) with main (28f9fa5)}

Summary

⚡ 1 improvements

Benchmarks breakdown

	Benchmark	main	no_cov_benchmarks	Change
⚡	test_scanner_async_on_advertisement	35.5 ms	22.8 ms	+55.76%

[bdraco]

Looks like its almost all protobuf overhead so nothing we can really do to improve it