Update CHANGELOG.md

Author: dak1n1

CHANGELOG.md

@@ -1,7 +1,8 @@
 ## 2.3.1 (Unreleased)
 
 BUG FIXES:
-* `cluster_ip` for `kubernetes_service` should support value `None` (#1291)
+* `cluster_ip` for `kubernetes_service` should support value `None` ([#1291](https://github.com/hashicorp/terraform-provider-kubernetes/pull/1291))
+* Remove `self_link` from metadata ([#1294](https://github.com/hashicorp/terraform-provider-kubernetes/pull/1294))
 
 ## 2.3.0 (June 02, 2021)