Merge pull request etcd-io#17488 from halleyshx/grpcproxy-changelog3.…

…5-of-pr17447

update CHANGELOG-3.5.md for etcd-io#17447

CHANGELOG/CHANGELOG-3.5.md

@@ -14,6 +14,12 @@ Previous change logs can be found at [CHANGELOG-3.4](https://github.com/etcd-io/
 - [Ignore SetKeepAlivePeriod errors on OpenBSD](https://github.com/etcd-io/etcd/pull/17387).
 - [Support unix/unixs socket in client or peer URLs](https://github.com/etcd-io/etcd/pull/15940)
 
+### gRPC Proxy
+- Add [three flags (see below) for grpc-proxy](https://github.com/etcd-io/etcd/pull/17447)
+  - `--dial-keepalive-time`
+  - `--dial-keepalive-timeout`
+  - `--permit-without-stream`
+
 ### Dependencies
 - Compile binaries using [go 1.21.6](https://github.com/etcd-io/etcd/pull/17362)