CHANGELOG: update for https://github.com/etcd-io/etcd/pull/11980 , https://github.com/etcd-io/etcd/pull/11986 , https://github.com/etcd-io/etcd/pull/11987 .

CHANGELOG-3.5.md

@@ -126,6 +126,9 @@ Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 - Improve logging around snapshot send and receive.
 - [Push down RangeOptions.limit argv into index tree to reduce memory overhead](https://github.com/etcd-io/etcd/pull/11990).
 - Add [reason field for /health response](https://github.com/etcd-io/etcd/pull/11983).
+- Add [etcd --auth-token-ttl](https://github.com/etcd-io/etcd/pull/11980) flag to customize `simpleTokenTTL` settings.
+- Improve [runtime.FDUsage objects malloc of Memory Usage and CPU Usage](https://github.com/etcd-io/etcd/pull/11986).
+- Improve [mvcc.watchResponse channel Memory Usage](https://github.com/etcd-io/etcd/pull/11987).
 
 ### Package `embed`
 

Documentation/op-guide/configuration.md

@@ -439,6 +439,11 @@ Follow the instructions when using these flags.
 + default: 10
 + env variable: (not supported)
 
+### --auth-token-ttl
++ Time (in seconds) of the auth-token-ttl. Support `--auth-token=simple` model only.
++ default: 300
++ env variable: (not supported)
+
 ## Experimental flags
 
 ### --experimental-corrupt-check-time