Add release notes for 3.2.0 (#1939)

Author: opensearch-ci-bot

release-notes/opensearch-opensearch-observability.release-notes-3.2.0.0.md

@@ -0,0 +1,9 @@
+## Version 3.2.0 Release Notes
+
+Compatible with OpenSearch and OpenSearch Dashboards version 3.2.0
+
+### Maintenance
+
+* [AUTO] Increment version to 3.2.0-SNAPSHOT ([#1933](https://github.com/opensearch-project/opensearch-observability/pull/1933))
+* Update the maven snapshot publish endpoint and credential ([#1931](https://github.com/opensearch-project/opensearch-observability/pull/1931))
+* Upgrade gradle to 8.14.3 and run CI checks with JDK24 ([#1937](https://github.com/opensearch-project/opensearch-observability/pull/1937))