Merge pull request #18317 from mohamedawnallah/changelog-3.5-fmtgRPCM…

…etadata

CHANGELOG/CHANGELOG-3.5.md: update changelog for gRPC metadata printing

CHANGELOG/CHANGELOG-3.5.md

@@ -12,6 +12,9 @@ Previous change logs can be found at [CHANGELOG-3.4](https://github.com/etcd-io/
 - Fix [noisy logs from simple auth token expiration by reducing log level to debug](https://github.com/etcd-io/etcd/pull/18245)
 - [Differentiate the warning message for rejected client and peer connections](https://github.com/etcd-io/etcd/pull/18319)
 
+### Package clientv3
+- [Print gRPC metadata in guaranteed order using the official go fmt pkg](https://github.com/etcd-io/etcd/pull/18312).
+
 ### Dependencies
 - Compile binaries using [go 1.21.12](https://github.com/etcd-io/etcd/pull/18271).
 - [Fully address CVE-2023-45288 and fix govulncheck CI check](https://github.com/etcd-io/etcd/pull/18170)