CHANGELOG: update from PR 11254

CHANGELOG-3.4.md

@@ -19,6 +19,14 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.4.1...v3.4.2) and
 
 - Upgrade [`google.golang.org/grpc`](https://github.com/grpc/grpc-go/releases) from [**`v1.23.1`**](https://github.com/grpc/grpc-go/releases/tag/v1.23.1) to [**`v1.24.0`**](https://github.com/grpc/grpc-go/releases/tag/v1.24.0).
 
+### Metrics, Monitoring
+
+See [List of metrics](https://github.com/etcd-io/etcd/tree/master/Documentation/metrics) for all metrics per release.
+
+Note that any `etcd_debugging_*` metrics are experimental and subject to change.
+
+- Change [`etcd_cluster_version`](https://github.com/etcd-io/etcd/pull/11254) Prometheus metrics to include only major and minor version.
+
 ### etcdctl v3
 
 - Fix [`etcdctl member add`](https://github.com/etcd-io/etcd/pull/11194) command to prevent potential timeout.

CHANGELOG-3.5.md

@@ -62,6 +62,7 @@ Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 - Deprecated `etcd_debugging_mvcc_range_total` Prometheus metric. Use `etcd_mvcc_range_total` instead.
 - Add [`etcd_debugging_mvcc_current_revision`](https://github.com/etcd-io/etcd/pull/11126) Prometheus metric.
 - Add [`etcd_debugging_mvcc_compact_revision`](https://github.com/etcd-io/etcd/pull/11126) Prometheus metric.
+- Change [`etcd_cluster_version`](https://github.com/etcd-io/etcd/pull/11254) Prometheus metrics to include only major and minor version.
 
 ### etcd server