[ruby] Update Ruby 3.4.8 → 3.4.9

[depfu]

Here is everything you need to know about this upgrade. Please take a good look at what changed and the test results before merging this pull request.

What changed?

Release Notes

3.4.9

Posted by nagachika on 11 Mar 2026

      <p>Ruby 3.4.9 has been released.</p>

This release includes an update to the zlib gem addressing CVE-2026-27820, along with other bug fixes. Please see the GitHub releases for further details.

We recommend updating your version of the zlib gem. This release has been made for the convenience of those who wish to continue using it as a default gem.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.93%. Comparing base (7eb0768) to head (52fe60f).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #2751   +/-   ##
========================================
  Coverage    84.93%   84.93%           
========================================
  Files          501      501           
  Lines        20600    20600           
  Branches       377      377           
========================================
  Hits         17497    17497           
  Misses        3100     3100           
  Partials         3        3           

Flag	Coverage Δ
javascript	80.25% <ø> (ø)
pull_request	84.93% <ø> (-0.01%)	⬇️
push	84.93% <ø> (ø)
ruby	92.54% <ø> (ø)

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