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]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.36%. Comparing base (7b1f0f2) to head (838549c).
⚠️ 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     

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7b1f0f2...838549c. Read the comment docs.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[fuweid]

/retest

[fuweid]

/retest

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ahrtr, fuweid

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [ahrtr,fuweid]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment