adding 2.15 release notes (#1240)

Signed-off-by: Amit Galitzky <amgalitz@amazon.com>

release-notes/opensearch-anomaly-detection.release-notes-2.15.0.0.md

@@ -0,0 +1,17 @@
+## Version 2.15.0.0 Release Notes
+
+Compatible with OpenSearch 2.15.0
+
+### Enhancements
+
+* Refinement of Forecasting and AD Precision/Recall Improvements ([#1210](https://github.com/opensearch-project/anomaly-detection/pull/1210))
+* make jvm heap usage a dynamic setting ([#1212](https://github.com/opensearch-project/anomaly-detection/pull/1212))
+* Add custom result index lifecycle management condition fields to config ([#1215](https://github.com/opensearch-project/anomaly-detection/pull/1215))
+* Make Custom Result Index Name an Alias ([#1225](https://github.com/opensearch-project/anomaly-detection/pull/1225))
+* add custom result index lifecycle management ([#1232](https://github.com/opensearch-project/anomaly-detection/pull/1232))
+* Merge Single-Stream and HC Detector Profiling Workflows ([#1237](https://github.com/opensearch-project/anomaly-detection/pull/1237))
+
+
+### Infrastructure
+
+* dependabot: bump com.diffplug.spotless from 6.24.0 to 6.25.0 ([#1184](https://github.com/opensearch-project/anomaly-detection/pull/1184))