CHANGELOG-3.5.md: update for fix zombie members in v3store

[fuweid]

REF: #20995

Please read https://github.com/etcd-io/etcd/blob/main/CONTRIBUTING.md#contribution-flow.

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests. :white_check_mark: Project coverage is 69.36%. Comparing base (7b1f0f2) to head (838549c). :warning: Report is 2 commits behind head on main.

Additional details and impacted files

see 20 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #21008      +/-   ##
==========================================
+ Coverage   69.21%   69.36%   +0.14%     
==========================================
  Files         422      422              
  Lines       34841    34841              
==========================================
+ Hits        24114    24166      +52     
+ Misses       9328     9290      -38     
+ Partials     1399     1385      -14     

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[fuweid]

/retest

[fuweid]

/retest

[k8s-ci-robot]

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