docs: remove irrelevant changelog entry

[vdusek]

Summary

• Remove the tar security vulnerability entry from the changelog as it relates to the website dependency, not the Python client itself.

Test plan

• Verify the changelog no longer contains the irrelevant entry
• No code changes, documentation only

🤖 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 (14b5558).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #627   +/-   ##
=======================================
  Coverage   76.18%   76.18%           
=======================================
  Files          42       42           
  Lines        2482     2482           
=======================================
  Hits         1891     1891           
  Misses        591      591           

Flag	Coverage Δ
integration	68.77% <ø> (ø)
unit	65.47% <ø> (ø)

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