CHANGELOG/CHANGELOG-3.4.md: update changelog

In this commit, we update the changelog for gRPC metadata printing in release 3.4 which is mainly a backport from PR etcd-io#18311. Signed-off-by: Mohamed Awnallah <[email protected]>
mohamedawnallah · Jul 13, 2024 · 04eed2c · 04eed2c
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diff --git a/CHANGELOG/CHANGELOG-3.4.md b/CHANGELOG/CHANGELOG-3.4.md
@@ -832,6 +832,7 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.3.0...v3.4.0) and
 - Add `etcd --experimental-peer-skip-client-san-verification` to [skip verification of peer client address](https://github.com/etcd-io/etcd/pull/10524).
 - Add `etcd --experimental-compaction-batch-limit` to [sets the maximum revisions deleted in each compaction batch](https://github.com/etcd-io/etcd/pull/11034).
 - Reduced default compaction batch size from 10k revisions to 1k revisions to improve p99 latency during compactions and reduced wait between compactions from 100ms to 10ms.
+- [print gRPC metadata in guarnteed order using the official go fmt pkg](https://github.com/etcd-io/etcd/pull/18311).
 
 ### Breaking Changes