CHANGELOG: updates from #9298

[hexfusion]

added details to CHANGELOG for #9298

[codecov-io]

Codecov Report

Merging #9321 into master will decrease coverage by 0.06%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #9321      +/-   ##
==========================================
- Coverage   75.82%   75.75%   -0.07%     
==========================================
  Files         365      365              
  Lines       30695    30695              
==========================================
- Hits        23274    23254      -20     
- Misses       5807     5824      +17     
- Partials     1614     1617       +3

Impacted Files	Coverage Δ
proxy/grpcproxy/register.go	69.44% <0%> (-13.89%)	⬇️
etcdctl/ctlv3/command/lease_command.go	65.34% <0%> (-5.95%)	⬇️
clientv3/concurrency/session.go	88.63% <0%> (-4.55%)	⬇️
proxy/grpcproxy/watch.go	90.06% <0%> (-3.11%)	⬇️
etcdserver/api/v3election/election.go	64.7% <0%> (-2.95%)	⬇️
etcdserver/api/v3rpc/lease.go	83.78% <0%> (-2.71%)	⬇️
clientv3/concurrency/election.go	79.52% <0%> (-2.37%)	⬇️
internal/lease/leasehttp/http.go	63.97% <0%> (-1.48%)	⬇️
etcdserver/v3_server.go	81.49% <0%> (-0.78%)	⬇️
clientv3/watch.go	95.83% <0%> (-0.74%)	⬇️
... and 10 more

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[gyuho]

lgtm. Thanks!