Add release notes for 3.8.0 (#2480)

Signed-off-by: opensearch-ci-bot <opensearch-infra@amazon.com>

Author: opensearch-ci-bot

release-notes/opensearch-security-dashboards-plugin.release-notes-3.8.0.0.md

@@ -0,0 +1,31 @@
+## Version 3.8.0 Release Notes
+
+Compatible with OpenSearch and OpenSearch Dashboards version 3.8.0
+
+### Enhancements
+
+* Onboard code diff analyzer/reviewer and issue dedupe workflows ([#2463](https://github.com/opensearch-project/security-dashboards-plugin/pull/2463))
+* Onboard new backport-pr reusable GitHub workflow ([#2456](https://github.com/opensearch-project/security-dashboards-plugin/pull/2456))
+* Enforce 256-character limit on all text input fields ([#2444](https://github.com/opensearch-project/security-dashboards-plugin/pull/2444))
+
+### Bug Fixes
+
+* Disable multi-tenancy in multi-data-source tests to fix credential lookup failures ([#2479](https://github.com/opensearch-project/security-dashboards-plugin/pull/2479))
+* Update proxy-agent to v8 to resolve CVE-2026-44240 and CVE-2026-42338 ([#2440](https://github.com/opensearch-project/security-dashboards-plugin/pull/2440))
+
+### Infrastructure
+
+* Use opensearch-build composite actions for OpenSearch and OpenSearch Dashboards setup in CI workflows ([#2443](https://github.com/opensearch-project/security-dashboards-plugin/pull/2443))
+* Update opensearch-build action SHA to include OSD snapshot URL fix ([#2445](https://github.com/opensearch-project/security-dashboards-plugin/pull/2445))
+* Switch whitesource configMode to AUTO for automatic branch scanning ([#2447](https://github.com/opensearch-project/security-dashboards-plugin/pull/2447))
+* Migrate Jest test suite to Jest 30 and jsdom 26 ([#2475](https://github.com/opensearch-project/security-dashboards-plugin/pull/2475))
+* Bump actions/checkout from 6.0.2 to 7.0.0 ([#2449](https://github.com/opensearch-project/security-dashboards-plugin/pull/2449))
+* Bump actions/setup-java from 5.2.0 to 5.3.0 ([#2451](https://github.com/opensearch-project/security-dashboards-plugin/pull/2451))
+* Bump actions/setup-java from 5.3.0 to 5.4.0 ([#2460](https://github.com/opensearch-project/security-dashboards-plugin/pull/2460))
+* Bump lycheeverse/lychee-action to 39066c6 ([#2450](https://github.com/opensearch-project/security-dashboards-plugin/pull/2450))
+* Bump lycheeverse/lychee-action to e747777 ([#2461](https://github.com/opensearch-project/security-dashboards-plugin/pull/2461))
+* Bump opensearch-project/opensearch-build to 3d9a524 ([#2448](https://github.com/opensearch-project/security-dashboards-plugin/pull/2448))
+
+### Maintenance
+
+* Adopt ESLint 10 flat config format and apply Prettier 3 formatting ([#2469](https://github.com/opensearch-project/security-dashboards-plugin/pull/2469))