docs: remove irrelevant changelog entry

[vdusek]

Summary

• Remove the "Update black to fix ReDoS vulnerability" entry from the v2.4.1 changelog, as it is not relevant to this package

Test plan

• Verify the changelog entry is removed
• Verify surrounding entries are intact

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.18%. Comparing base (03b0e9c) to head (2094c77).
⚠️ Report is 4 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #628   +/-   ##
=======================================
  Coverage   76.18%   76.18%           
=======================================
  Files          42       42           
  Lines        2482     2482           
=======================================
  Hits         1891     1891           
  Misses        591      591           

Flag	Coverage Δ
integration	69.05% <ø> (+0.28%)	⬆️
unit	65.47% <ø> (ø)

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