Add release notes for 2.7 (#684) (#686)

Signed-off-by: Rupal Mahajan <maharup@amazon.com>
(cherry picked from commit 8fafd72)

Co-authored-by: Rupal Mahajan <maharup@amazon.com>

release-notes/opensearch-reporting.release-notes-2.7.0.0.md

@@ -0,0 +1,13 @@
+## Version 2.7.0.0 Release Notes
+Compatible with OpenSearch and OpenSearch Dashboards Version 2.7.0
+
+### Infrastructure
+* Add publish snapshots to maven via GHA  ([#651](https://github.com/opensearch-project/reporting/pull/651))
+
+### Bug Fixes
+* Bump mockito-core version ([#678](https://github.com/opensearch-project/reporting/pull/678))
+* Fix ci failures ([#681](https://github.com/opensearch-project/reporting/pull/681))
+
+### Maintenance
+* Increment version to 2.7.0-SNAPSHOT ([#657](https://github.com/opensearch-project/reporting/pull/657))
+* Bump snakeyaml to 2.0 ([#674](https://github.com/opensearch-project/reporting/pull/674))