CHANGELOG: add note for the CompactionSleepInterval flag(PR 18514)

[JalinWang]

Update the CHANGELOG regarding introducing the etcd --experimental-compaction-sleep-interval flag (#18514)

[k8s-ci-robot]

Hi @JalinWang. Thanks for your PR.

I'm waiting for a etcd-io member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.74%. Comparing base (f89dfed) to head (9f54e54).

❗ Current head 9f54e54 differs from pull request most recent head 7fcc3cf

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Additional details and impacted files

see 22 files with indirect coverage changes

@@            Coverage Diff             @@
##             main   #18556      +/-   ##
==========================================
- Coverage   68.76%   68.74%   -0.03%     
==========================================
  Files         420      420              
  Lines       35470    35470              
==========================================
- Hits        24391    24383       -8     
- Misses       9658     9666       +8     
  Partials     1421     1421              

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[ivanvc]

/ok-to-test

[jmhbnz]

LGTM - Thanks @JalinWang

[ivanvc]

LGTM. Thanks, Jalin.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ahrtr, ivanvc, JalinWang, jmhbnz

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