Fix milestone job

[TonyCTHsu]

What does this PR do?
The job is broken because the previous change https://github.com/DataDog/dd-trace-rb/pull/4457/files#diff-aef600c7d513d344ec6a22c6780e7555f28e946db6685f4c2151500961b2780b

Change log entry
None.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.68%. Comparing base (fb1935b) to head (8389619).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4470      +/-   ##
==========================================
- Coverage   97.70%   97.68%   -0.02%     
==========================================
  Files        1376     1376              
  Lines       83825    83825              
  Branches     4251     4251              
==========================================
- Hits        81899    81887      -12     
- Misses       1926     1938      +12     

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[datadog-datadog-prod-us1]

Datadog Report

Branch report: tonycthsu/fix-milestone-job
Commit report: 8389619
Test service: dd-trace-rb

✅ 0 Failed, 20623 Passed, 1370 Skipped, 3m 15.71s Total Time

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-03-06 22:07:05

Comparing candidate commit 8389619 in PR branch tonycthsu/fix-milestone-job with baseline commit fb1935b in branch master.

Found 0 performance improvements and 1 performance regressions! Performance is the same for 30 metrics, 2 unstable metrics.

scenario:tracing - 100 span trace - no writer

• 🟥 throughput [-18.469op/s; -17.889op/s] or [-5.297%; -5.131%]