Update CHANGELOG for v1.2.0.

CHANGELOG.md

@@ -9,8 +9,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
-- Added detection of systemd cgroups to the `IsContainerized` check. [#71](https://github.com/elastic/go-sysinfo/pull/71)
-
 ### Changed
 
 ### Deprecated
@@ -19,7 +17,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
-### Security
+## [1.2.0] - 2019-12-09
+
+### Added
+
+- Added detection of systemd cgroups to the `IsContainerized` check. [#71](https://github.com/elastic/go-sysinfo/pull/71)
+- Added networking counters for Linux hosts. [#72](https://github.com/elastic/go-sysinfo/pull/72)
 
 ## [1.1.1] - 2019-10-29
 
@@ -66,7 +69,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Changed the host containerized check to reduce false positives. [#42](https://github.com/elastic/go-sysinfo/pull/42) [#43](https://github.com/elastic/go-sysinfo/pull/43)
 
-[Unreleased]: https://github.com/elastic/go-sysinfo/compare/v1.1.1...HEAD
+[Unreleased]: https://github.com/elastic/go-sysinfo/compare/v1.2.0...HEAD
+[1.2.0]: https://github.com/elastic/go-sysinfo/releases/tag/v1.2.0
 [1.1.1]: https://github.com/elastic/go-sysinfo/releases/tag/v1.1.0
 [1.1.0]: https://github.com/elastic/go-sysinfo/releases/tag/v1.1.0
 [1.0.2]: https://github.com/elastic/go-sysinfo/releases/tag/v1.0.2