update changelog

CHANGELOG.md

@@ -5,6 +5,17 @@ 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).
 
+## Unreleased
+
+### Added
+
+- add new columns `gcom_org_contract_type`, `gcom_org_has_irm_sku`, and `gcom_org_oldest_admin_with_billing_privileges_user_id`
+  to `user_management_organization` table + `is_restricted` column to `alerts_alertgroup` table
+  by @joeyorlando ([1522](https://github.com/grafana/oncall/pull/1522))
+- emit two new Django signals by @joeyorlando ([1522](https://github.com/grafana/oncall/pull/1522))
+  - `org_sync_signal` at the end of the `engine/apps/user_management/sync.py::sync_organization` method
+  - `alert_group_created_signal` when a new Alert Group is created
+
 ## v1.2.8 (2023-04-06)
 
 ### Changed
@@ -91,11 +102,6 @@ Only some minor performance/developer setup changes to report in this version.
 
 - Modified `check_escalation_finished_task` celery task to use read-only databases for its query, if one is defined +
   make the validation logic stricter + ping a configurable heartbeat on successful completion of this task ([1266](https://github.com/grafana/oncall/pull/1266))
-- add new columns `gcom_org_contract_type` and `gcom_org_has_irm_sku` to `user_management_organization` table +
-  `is_restricted` column to `alerts_alertgroup` table ([1522](https://github.com/grafana/oncall/pull/1522))
-- emit two new Django signals ([1522](https://github.com/grafana/oncall/pull/1522))
-  - `org_sync_signal` at the end of the `engine/apps/user_management/sync.py::sync_organization` method
-  - `alert_group_created_signal` when a new Alert Group is created
 
 ### Changed