CHANGELOG: update Go version in v3.3.3

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

CHANGELOG-3.3.md

@@ -25,7 +25,7 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.3.2...v3.3.3) and [
 
 ### Go
 
-- Compile with [*Go 1.9.4*](https://golang.org/doc/devel/release.html#go1.9).
+- Compile with [*Go 1.9.5*](https://golang.org/doc/devel/release.html#go1.9).
 
 
 ## [v3.3.2](https://github.com/coreos/etcd/releases/tag/v3.3.2) (2018-03-08)