chore(deps): bump coverlet.collector to avoid vulnerability warnings

[jpnurmi]

JetBrains Rider keeps nagging even if we have explicitly pinned the transitive Newtonsoft.Json dependency. Is it ok to bump the version for tests to get rid of the vulnerability warnings?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.43%. Comparing base (03721c1) to head (ac95474).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4547      +/-   ##
==========================================
+ Coverage   73.39%   73.43%   +0.03%     
==========================================
  Files         479      479              
  Lines       17506    17505       -1     
  Branches     3480     3445      -35     
==========================================
+ Hits        12849    12855       +6     
+ Misses       3776     3772       -4     
+ Partials      881      878       -3     

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