CHANGELOG-3.4: add v3.4.0 for tomorrow

Signed-off-by: Gyuho Lee <leegyuho@amazon.com>

CHANGELOG-3.3.md

@@ -572,14 +572,15 @@ See [code changes](https://github.com/etcd-io/etcd/compare/v3.3.0...v3.3.1) and
 
 See [code changes](https://github.com/etcd-io/etcd/compare/v3.2.0...v3.3.0) and [v3.3 upgrade guide](https://github.com/etcd-io/etcd/blob/master/Documentation/upgrades/upgrade_3_3.md) for any breaking changes.
 
-**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.3 upgrade guide](https://github.com/etcd-io/etcd/blob/master/Documentation/upgrades/upgrade_3_3.md).**
-
+- [v3.3.0](https://github.com/etcd-io/etcd/releases/tag/v3.3.0) (2018-02-01), see [code changes](https://github.com/etcd-io/etcd/compare/v3.3.0-rc.4...v3.3.0).
 - [v3.3.0-rc.4](https://github.com/etcd-io/etcd/releases/tag/v3.3.0-rc.4) (2018-01-22), see [code changes](https://github.com/etcd-io/etcd/compare/v3.3.0-rc.3...v3.3.0-rc.4).
 - [v3.3.0-rc.3](https://github.com/etcd-io/etcd/releases/tag/v3.3.0-rc.3) (2018-01-17), see [code changes](https://github.com/etcd-io/etcd/compare/v3.3.0-rc.2...v3.3.0-rc.3).
 - [v3.3.0-rc.2](https://github.com/etcd-io/etcd/releases/tag/v3.3.0-rc.2) (2018-01-11), see [code changes](https://github.com/etcd-io/etcd/compare/v3.3.0-rc.1...v3.3.0-rc.2).
 - [v3.3.0-rc.1](https://github.com/etcd-io/etcd/releases/tag/v3.3.0-rc.1) (2018-01-02), see [code changes](https://github.com/etcd-io/etcd/compare/v3.3.0-rc.0...v3.3.0-rc.1).
 - [v3.3.0-rc.0](https://github.com/etcd-io/etcd/releases/tag/v3.3.0-rc.0) (2017-12-20), see [code changes](https://github.com/etcd-io/etcd/compare/v3.2.0...v3.3.0-rc.0).
 
+**Again, before running upgrades from any previous release, please make sure to read change logs below and [v3.3 upgrade guide](https://github.com/etcd-io/etcd/blob/master/Documentation/upgrades/upgrade_3_3.md).**
+
 ### Improved
 
 - Use [`coreos/bbolt`](https://github.com/coreos/bbolt/releases) to replace [`boltdb/bolt`](https://github.com/boltdb/bolt#project-status).

CHANGELOG-3.4.md

@@ -10,6 +10,7 @@ Previous change logs can be found at [CHANGELOG-3.3](https://github.com/etcd-io/
 
 See [code changes](https://github.com/etcd-io/etcd/compare/v3.3.0...v3.4.0) and [v3.4 upgrade guide](https://github.com/etcd-io/etcd/blob/master/Documentation/upgrades/upgrade_3_4.md) for any breaking changes.
 
+- [v3.4.0](https://github.com/etcd-io/etcd/releases/tag/v3.4.0) (2019-08-30), see [code changes](https://github.com/etcd-io/etcd/compare/v3.4.0-rc.4...v3.4.0).
 - [v3.4.0-rc.4](https://github.com/etcd-io/etcd/releases/tag/v3.4.0-rc.4) (2019-08-29), see [code changes](https://github.com/etcd-io/etcd/compare/v3.4.0-rc.3...v3.4.0-rc.4).
 - [v3.4.0-rc.3](https://github.com/etcd-io/etcd/releases/tag/v3.4.0-rc.3) (2019-08-27), see [code changes](https://github.com/etcd-io/etcd/compare/v3.4.0-rc.2...v3.4.0-rc.3).
 - [v3.4.0-rc.2](https://github.com/etcd-io/etcd/releases/tag/v3.4.0-rc.2) (2019-08-23), see [code changes](https://github.com/etcd-io/etcd/compare/v3.4.0-rc.1...v3.4.0-rc.2).