Add release notes for 2.7.0 (opensearch-project#1407)

* Add release notes for 2.7.0

Signed-off-by: Ryan Liang <jiallian@amazon.com>
Signed-off-by: leanneeliatra <leanne.laceybyrne@eliatra.com>

release-notes/opensearch-security-dashboards-plugin.release-notes-2.7.0.0.md

@@ -0,0 +1,23 @@
+## 2023-04-25 Version 2.7.0.0
+
+Compatible with Opensearch-Dashboards 2.7.0
+
+### Features
+
+* Dynamic tenancy configurations ([#1394](https://github.com/opensearch-project/security-dashboards-plugin/pull/1394))
+
+### Bug Fixes
+
+* Fix No blank backend role before adding a new one in Create User page ([#1384](https://github.com/opensearch-project/security-dashboards-plugin/pull/1384))
+* Fix "Get started" image is not adaptive to the browser window size. ([#1396](https://github.com/opensearch-project/security-dashboards-plugin/pull/1396))
+
+### Enhancements
+
+* Replace legacy template with index template ([#1359](https://github.com/opensearch-project/security-dashboards-plugin/pull/1359))
+* Add loginEndPointWithPath ([#1358](https://github.com/opensearch-project/security-dashboards-plugin/pull/1358))
+* Add new actions for ppl and datasource apis ([#1395](https://github.com/opensearch-project/security-dashboards-plugin/pull/1395))
+* Split up a value into multiple cookie payloads ([#1352](https://github.com/opensearch-project/security-dashboards-plugin/pull/1352))
+
+### Infrastructure
+
+* Add auto-release workflow ([#1339](https://github.com/opensearch-project/security-dashboards-plugin/pull/1339))