Adding 2.13 release notes (opensearch-project#1170) (opensearch-project#1171)

(cherry picked from commit 303ceb5)

Signed-off-by: Joshua Palis <[email protected]>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: opensearch-trigger-bot[bot]

release-notes/opensearch-anomaly-detection.release-notes-2.13.0.0.md

@@ -0,0 +1,9 @@
+## Version 2.13.0.0 Release Notes
+
+Compatible with OpenSearch 2.13.0
+
+### Infrastructure
+* Fixed lucene url ([#1158](https://github.com/opensearch-project/anomaly-detection/pull/1158))
+
+### Maintenance
+* Increment version to 2.13.0-SNAPSHOT ([#1156](https://github.com/opensearch-project/anomaly-detection/pull/1156))