Update changelog to include fix for compaction pause duration metric

Signed-off-by: Miancheng Lin <[email protected]>

Author: miancheng7

CHANGELOG/CHANGELOG-3.5.md

@@ -6,6 +6,10 @@ Previous change logs can be found at [CHANGELOG-3.4](https://github.com/etcd-io/
 
 ## v3.5.22 (TBC)
 
+### etcd server
+
+- Fix [the compaction pause duration metric is not emitted for every compaction batch](https://github.com/etcd-io/etcd/pull/19771)
+
 ### Package `clientv3`
 
 - [Replace `resolver.State.Addresses` with `resolver.State.Endpoint.Addresses`](https://github.com/etcd-io/etcd/pull/19783).

CHANGELOG/CHANGELOG-3.6.md

@@ -10,6 +10,10 @@ Previous change logs can be found at [CHANGELOG-3.5](https://github.com/etcd-io/
 
 ## v3.6.0-rc.5 (tbd)
 
+### etcd server
+
+- Fix [the compaction pause duration metric is not emitted for every compaction batch](https://github.com/etcd-io/etcd/pull/19770)
+
 ### Package `clientv3`
 
 - [Replace `resolver.State.Addresses` with `resolver.State.Endpoint.Addresses`](https://github.com/etcd-io/etcd/pull/19782).