Update release notes (#20845) (#20846)

(cherry picked from commit ea7527b)

Signed-off-by: Andriy Redko <drreta@gmail.com>
Co-authored-by: Divya Madala <113469545+Divyaasm@users.noreply.github.com>

Author: reta

release-notes/opensearch.release-notes-2.19.5.md

@@ -0,0 +1,19 @@
+## Version 2.19.5 Release Notes
+
+Compatible with OpenSearch and OpenSearch Dashboards version 2.19.5
+
+### Bug Fixes
+
+* Add case sensitivity as an argument to XContentMapValues.filter ([#19976](https://github.com/opensearch-project/OpenSearch/pull/19976))
+* Fix segment replication failure during rolling restart ([#20498](https://github.com/opensearch-project/OpenSearch/pull/20498))
+
+### Infrastructure
+
+* Update wrapper github workflow version ([#20748](https://github.com/opensearch-project/OpenSearch/pull/20748))
+
+### Maintenance
+
+* Bulk update of HDFS test fixture dependencies ([#20768](https://github.com/opensearch-project/OpenSearch/pull/20768))
+* Bump shadow-gradle-plugin from 8.3.9 to 9.3.1 ([#20569](https://github.com/opensearch-project/OpenSearch/pull/20569))
+* Bump netty from 4.1.125.Final to 4.1.131.Final ([#20744](https://github.com/opensearch-project/OpenSearch/pull/20744))
+* Bump log4j from 2.21.0 to 2.25.3 ([#20308](https://github.com/opensearch-project/OpenSearch/pull/20308))