Add release note of 2.7 (#694) (#697)

* Add release note of 2.7

Signed-off-by: suzhou <suzhou@amazon.com>

* Add release note of 2.7

Signed-off-by: suzhou <suzhou@amazon.com>

* feat: update

Signed-off-by: suzhou <suzhou@amazon.com>

---------

Signed-off-by: suzhou <suzhou@amazon.com>
(cherry picked from commit 9c9b5f0)

Co-authored-by: suzhou <suzhou@amazon.com>

release-notes/opensearch-index-management-dashboards-plugin.release-notes-2.7.0.0.md

@@ -0,0 +1,20 @@
+## Version 2.7.0.0 2023-04-18
+
+Compatible with OpenSearch 2.7.0
+
+### Features
+* Feature: Enhancement of JSON validation on JSON editor of index mapping  ([#606](https://github.com/opensearch-project/index-management-dashboards-plugin/pull/606))
+* Feature: Enable component templates management and simulation  ([#662](https://github.com/opensearch-project/index-management-dashboards-plugin/pull/662))
+
+### Bug Fixes
+* Fix link destination and make the link open in a new window. ([#652](https://github.com/opensearch-project/index-management-dashboards-plugin/pull/652))
+* Add downgrade logic when fetching indexes ([#684](https://github.com/opensearch-project/index-management-dashboards-plugin/pull/684))
+
+### Refactoring
+* Refractor e2e test to be the same structure as FTRepo ([#663](https://github.com/opensearch-project/index-management-dashboards-plugin/pull/663))
+
+### Maintenance
+* Bumped version to 2.7. ([#695](https://github.com/opensearch-project/index-management-dashboards-plugin/pull/695))
+
+### Documentation
+* 2.7 release note ([#694](https://github.com/opensearch-project/index-management-dashboards-plugin/pull/694))