chore: release 3.2.0 (#83)

* updated CHANGELOG.md [ci skip]

* updated README.md [ci skip]

Author: release-please[bot]

CHANGELOG.md

@@ -4,6 +4,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [3.2.0](https://www.github.com/terraform-google-modules/terraform-google-lb-http/compare/v3.1.0...v3.2.0) (2020-02-13)
+
+
+### Features
+
+* Add submodule which ignores changes to backend group ([#81](https://www.github.com/terraform-google-modules/terraform-google-lb-http/issues/81)) ([d8d3e33](https://www.github.com/terraform-google-modules/terraform-google-lb-http/commit/d8d3e33dc3a128c8790476d44ae45f8465f9fa51))
+
 ## [3.1.0](https://www.github.com/terraform-google-modules/terraform-google-lb-http/compare/v3.0.0...v3.1.0) (2020-01-28)