Fix flaky spec for jruby

[solnic]

#skip-changelog

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.83%. Comparing base (2739c4c) to head (d8bbb2c).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2635      +/-   ##
==========================================
+ Coverage   96.72%   96.83%   +0.11%     
==========================================
  Files         133      133              
  Lines        5125     5124       -1     
==========================================
+ Hits         4957     4962       +5     
+ Misses        168      162       -6     

Components	Coverage Δ
sentry-ruby	97.37% <ø> (-0.08%)	⬇️
sentry-rails	95.35% <ø> (+1.79%)	⬆️
sentry-sidekiq	92.74% <ø> (-1.49%)	⬇️
sentry-resque	94.44% <ø> (ø)
sentry-delayed_job	94.68% <ø> (ø)
sentry-opentelemetry	99.31% <ø> (+0.68%)	⬆️

see 19 files with indirect coverage changes

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