Update CHANGES release notes

Author: dghubble

CHANGES.md

@@ -4,22 +4,32 @@ Notable changes between releases.
 
 ## Latest
 
-## v0.2.1 (2017-08-02)
+## v0.2.3
+
+* Document usage with the Terraform [3rd-party plugin](https://www.terraform.io/docs/configuration/providers.html#third-party-plugins) directory ([#39](https://github.com/coreos/terraform-provider-matchbox/pull/39))
+* Use Go v1.11.5 for pre-compiled binaries
+
+## v0.2.2
+
+* Improve client endpoint validation ([#23](https://github.com/coreos/terraform-provider-matchbox/pull/23))
+  * Provide better errors if endpoint includes a scheme or is missing a port
+
+## v0.2.1
 
 * Statically link the `terraform-provider-matchbox` binaries
 
-## v0.2.0 (2017-06-13)
+## v0.2.0
 
 * Add Profile `generic_config` field to write generic/experimental config templates to Matchbox
 * Add Profile `raw_ignition` field to write raw Ignition to Matchbox. Note that providing a `container_linux_config` is preferred.
 
-## v0.1.1 (2017-05-15)
+## v0.1.1
 
 Fix darwin release, which was compiled for Linux.
 
 * Fix Makefile cross-compilation
 
-## v0.1.0 (2017-04-07)
+## v0.1.0
 
 Initial release of the Matchbox Terraform Provider Plugin