Added 2.8 release notes (#445)

Signed-off-by: bowenlan-amzn <[email protected]>

release-notes/opensearch-security-analytics.release-notes-2.8.0.0.md

@@ -0,0 +1,22 @@
+## Version 2.8.0.0 2023-05-26
+
+Compatible with OpenSearch 2.8.0
+
+### Maintenance
+* Fixed compile issues related to latest OS core repo changes. ([#412](https://github.com/opensearch-project/security-analytics/pull/412))
+* Moved CODEOWNERS files to align with org requirements. ([#418](https://github.com/opensearch-project/security-analytics/pull/418))
+* Update CODEOWNERS. ([#434](https://github.com/opensearch-project/security-analytics/pull/434))
+
+### Features
+* add correlation engine for security-analytics. ([#405](https://github.com/opensearch-project/security-analytics/pull/405))
+* SearchRule API - source filtering. ([#374](https://github.com/opensearch-project/security-analytics/pull/374))
+* Alias and dataStream end-to-end ITs. ([#373](https://github.com/opensearch-project/security-analytics/pull/373))
+* add rules to correlations for correlation engine. ([#423](https://github.com/opensearch-project/security-analytics/pull/423))
+
+### Bug Fixes
+* Findings index mappings fix. ([#409](https://github.com/opensearch-project/security-analytics/pull/409))
+* fix for input validation of correlation rule names. ([#428](https://github.com/opensearch-project/security-analytics/pull/428))
+* fix for failure in syslogs mappings view api. ([#435](https://github.com/opensearch-project/security-analytics/pull/435))
+
+### Documentation
+* Added 2.8.0 release notes. ([#444](https://github.com/opensearch-project/security-analytics/pull/444))