Merge branch 'minor-ver-bump-min-ports-per-vm' into 'master'

update CHANGELOG for 3.1.2

See merge request !34

CHANGELOG

@@ -4,6 +4,11 @@ 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).
 
+## [3.1.2] - 2021-07-15
+### Changed
+ - Surface Cloud NAT variable for minimum number of SNAT tuples, supporting a larger
+   number of outbound connections id required.
+
 ## [3.1.1] - 2021-06-16
 ### Changed
  - Surface the alerting success threshold variable from the monitoring module.