CHANGELOG-3.3: update v3.3.4 release date

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>

CHANGELOG-3.3.md

@@ -1,6 +1,6 @@
 
 
-## [v3.3.4](https://github.com/coreos/etcd/releases/tag/v3.3.4) (2018-04-TBD)
+## [v3.3.4](https://github.com/coreos/etcd/releases/tag/v3.3.4) (2018-04-24)
 
 See [code changes](https://github.com/coreos/etcd/compare/v3.3.3...v3.3.4) and [v3.3 upgrade guide](https://github.com/coreos/etcd/blob/master/Documentation/upgrades/upgrade_3_3.md) for any breaking changes.
 
@@ -34,6 +34,10 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.3.3...v3.3.4) and [
 - Add [`embed.Config.InitialElectionTickAdvance`](https://github.com/coreos/etcd/pull/9591) to enable/disable initial election tick fast-forward.
   - `embed.NewConfig()` would return `*embed.Config` with `InitialElectionTickAdvance` as true by default.
 
+### Go
+
+- Compile with [*Go 1.9.5*](https://golang.org/doc/devel/release.html#go1.9).
+
 
 ## [v3.3.3](https://github.com/coreos/etcd/releases/tag/v3.3.3) (2018-03-29)