doc(base): Move a changelog entry to its correct place

[Hywan]

Thanks @richvdh for pointing it out in #5848 (comment).

[richvdh]

thanks!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.93%. Comparing base (97110ed) to head (5f93fed).
⚠️ Report is 13 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6011   +/-   ##
=======================================
  Coverage   88.93%   88.93%           
=======================================
  Files         357      357           
  Lines       99166    99166           
  Branches    99166    99166           
=======================================
+ Hits        88195    88197    +2     
+ Misses       6980     6977    -3     
- Partials     3991     3992    +1     

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[codspeed-hq]

Merging this PR will not alter performance

Summary

✅ 50 untouched benchmarks

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_{Comparing Hywan:doc-base-changelog (5f93fed) with main (97110ed)}