Adding release notes for 3.0-alpha1 (#1073)

Signed-off-by: Junwei Dai <junweid@amazon.com>
Co-authored-by: Junwei Dai <junweid@amazon.com>

Author: junweid62

CHANGELOG.md

@@ -8,14 +8,8 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.1.0/)
 ### Enhancements
 ### Bug Fixes
 ### Infrastructure
-- Set Java target compatibility to JDK 21 ([#730](https://github.com/opensearch-project/flow-framework/pull/730))
-
 ### Documentation
-- Add text to visualization agent template ([#936](https://github.com/opensearch-project/flow-framework/pull/936))
-
 ### Maintenance
-- Fix breaking changes for 3.0.0 release ([#1026](https://github.com/opensearch-project/flow-framework/pull/1026))
-
 ### Refactoring
 
 ## [Unreleased 2.x](https://github.com/opensearch-project/flow-framework/compare/2.18...2.x)

release-notes/opensearch-flow-framework.release-notes-3.0.0.0-alpha1.md

@@ -0,0 +1,12 @@
+## Version 3.0.0.0-alpha1 Release Notes
+
+Compatible with OpenSearch 3.0.0-alpha1
+
+### Infrastructure
+- Set Java target compatibility to JDK 21 ([#730](https://github.com/opensearch-project/flow-framework/pull/730))
+
+### Documentation
+- Add text to visualization agent template ([#936](https://github.com/opensearch-project/flow-framework/pull/936))
+
+### Maintenance
+- Fix breaking changes for 3.0.0 release ([#1026](https://github.com/opensearch-project/flow-framework/pull/1026))