add release note (#536)

Signed-off-by: zhichao-aws <[email protected]>

Author: zhichao-aws

release-notes/opensearch-skills.release-notes-3.0.0.0-alpha1.md

@@ -0,0 +1,9 @@
+## Version 3.0.0.0-alpha1 Release Notes
+
+Compatible with OpenSearch 3.0.0.0-alpha1
+
+### Infrastructure
+* Replace `ml-common-client` build dependency to `ml-common-common` and `ml-common-spi` (#529)[https://github.com/opensearch-project/skills/pull/529]
+
+### Documentation
+* Add tutorial to build and test custom tool (#521)[https://github.com/opensearch-project/skills/pull/521]