Release notes for 9.1.5 (#18248)

* Update release notes for 9.1.5

* finalize release notes

* Update docs/release-notes/index.md

Co-authored-by: Karen Metts <[email protected]>

* Update docs/release-notes/index.md

Co-authored-by: Karen Metts <[email protected]>

* Update docs/release-notes/index.md

Co-authored-by: Karen Metts <[email protected]>

---------

Co-authored-by: logstashmachine <[email protected]>
Co-authored-by: donoghuc <[email protected]>
Co-authored-by: Karen Metts <[email protected]>
(cherry picked from commit f861bb4)

Author: 4 people

docs/release-notes/index.md

@@ -21,6 +21,28 @@ To check for security updates, go to [Security announcements for the Elastic sta
 % ### Fixes [logstash-next-fixes]
 % *
 
+## 9.1.5 [logstash-9.1.5-release-notes]
+
+No user-facing changes in Logstash core.
+
+### Plugins [logstash-plugin-9.1.5-changes]
+
+**Elasticsearch Filter - 4.3.1**
+
+* Added support for encoded and non-encoded api-key formats on plugin configuration [#203](https://github.com/logstash-plugins/logstash-filter-elasticsearch/pull/203)
+
+**Elasticsearch Input - 5.2.1**
+
+* Added support for encoded and non-encoded api-key formats on plugin configuration [#237](https://github.com/logstash-plugins/logstash-input-elasticsearch/pull/237)
+
+**Jdbc Integration - 5.6.1**
+
+* Fixes an issue where the `jdbc_static` filter's throughput was artificially limited to 4 concurrent queries, causing the plugin to become a bottleneck in pipelines with more than 4 workers. Each instance of the plugin is now limited to 16 concurrent queries, with increased timeouts to eliminate enrichment failures. [#187](https://github.com/logstash-plugins/logstash-integration-jdbc/pull/187)
+
+**Elasticsearch Output - 12.0.7**
+
+* Support both, encoded and non encoded api-key formats on plugin configuration [#1223](https://github.com/logstash-plugins/logstash-output-elasticsearch/pull/1223)
+
 ## 9.1.4 [logstash-9.1.4-release-notes]
 
 ### Features and enhancements [logstash-9.1.4-features-enhancements]
@@ -387,4 +409,4 @@ Check out the [security advisory](https://discuss.elastic.co/c/announcements/sec
 
 **Tcp Output - 7.0.0**
 
-* Remove deprecated SSL settings [#58](https://github.com/logstash-plugins/logstash-output-tcp/pull/58)
+* Remove deprecated SSL settings [#58](https://github.com/logstash-plugins/logstash-output-tcp/pull/58)