CHANGELOG-3.6 Add etcd_disk_defrag_inflight to indicate if defrag is active

CHANGELOG-3.5.md

@@ -122,7 +122,6 @@ Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 - Add [`etcd_wal_write_bytes_total`](https://github.com/etcd-io/etcd/pull/11738).
 - Add [`etcd_debugging_auth_revision`](https://github.com/etcd-io/etcd/commit/f14d2a087f7b0fd6f7980b95b5e0b945109c95f3).
 - Add [`os_fd_used` and `os_fd_limit` to monitor current OS file descriptors](https://github.com/etcd-io/etcd/pull/12214).
-- Add [`etcd_disk_defrag_inflight`](https://github.com/etcd-io/etcd/pull/13371).
 
 ### etcd server
 

CHANGELOG-3.6.md

@@ -28,3 +28,10 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.5.0...v3.6.0).
 - Package `mvcc/buckets` was moved to `storage/schema`
 - Package `wal` was moved to `storage/wal`
 - Package `datadir` was moved to `storage/datadir`
+
+
+### Metrics, Monitoring
+
+See [List of metrics](https://etcd.io/docs/latest/metrics/) for all metrics per release.
+
+- Add [`etcd_disk_defrag_inflight`](https://github.com/etcd-io/etcd/pull/13371).