Add 2.10 release notes (#758)

Signed-off-by: Rupal Mahajan <maharup@amazon.com>
(cherry picked from commit 6a93631)
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

release-notes/opensearch-reporting.release-notes-2.10.0.0.md

@@ -0,0 +1,11 @@
+## Version 2.10.0.0 Release Notes
+
+Compatible with OpenSearch 2.10.0
+
+### Bug Fixes
+* Update import from upstream breaking changes ([#739](https://github.com/opensearch-project/reporting/pull/739))
+* Fix from upstream import changes ([#748](https://github.com/opensearch-project/reporting/pull/748))
+
+### Maintenance
+* Fix CI ([#738](https://github.com/opensearch-project/reporting/pull/738))
+* Update backport CI, add PR merged condition ([#745](https://github.com/opensearch-project/reporting/pull/745))