Update 3.6 changelog to cover the membership validation update

[ahrtr]

Link to #19703 , which is backport of #19694

I will also add the verification in release-3.6 as mentioned in #19694 (comment)

After that, we should be ready to release v3.6.0-rc.4.

cc @ivanvc @jmhbnz @serathius

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.60%. Comparing base (d6416b8) to head (ab98cdd).
Report is 2 commits behind head on main.

Additional details and impacted files

see 55 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #19708      +/-   ##
==========================================
+ Coverage   65.98%   68.60%   +2.62%     
==========================================
  Files         421      418       -3     
  Lines       35857    35722     -135     
==========================================
+ Hits        23659    24508     +849     
+ Misses      10791     9766    -1025     
- Partials     1407     1448      +41     

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[ivanvc]

LGTM. Thanks, @ahrtr.

[ahrtr]

cc @fuweid

[ahrtr]

/test pull-etcd-integration-1-cpu-arm64

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[APPROVALNOTIFIER] This PR is APPROVED

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[ivanvc]

After that, we should be ready to release v3.6.0-rc.4.

@jmhbnz, I'm out next week. Would you be able to help with this release? Otherwise, I can do the release on Monday, April 14th. Thanks :)

[ahrtr]

After that, we should be ready to release v3.6.0-rc.4.

@jmhbnz, I'm out next week. Would you be able to help with this release? Otherwise, I can do the release on Monday, April 14th. Thanks :)

No worries. April 14th+ works. Thanks