Changelog: Update changelog for 3.4.21
@@ -4,12 +4,13 @@ Previous change logs can be found at [CHANGELOG-3.3](https://github.com/etcd-io/
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-## v3.4.21 (TBD)
+## v3.4.21 (2022-09-15)
### etcd server
- Fix [Durability API guarantee broken in single node cluster](https://github.com/etcd-io/etcd/pull/14423)
- Fix [Panic due to nil log object](https://github.com/etcd-io/etcd/pull/14420)
- Fix [authentication data not loaded on member startup](https://github.com/etcd-io/etcd/pull/14410)
+- Fix [exit with error on shadowed environment variables](https://github.com/etcd-io/etcd/pull/14441)
### etcdctl v3
