[AUTO] Add release notes for 2.19.4 (#5759)

Co-authored-by: Craig Perkins <[email protected]>

Author: opensearch-ci-bot

release-notes/opensearch-security.release-notes-2.19.4.0.md

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+## Version 2.19.4 Release Notes
+
+Compatible with OpenSearch and OpenSearch Dashboards version 2.19.4
+
+### Bug Fixes
+* Create a WildcardMatcher.NONE when creating a WildcardMatcher with an empty string ([#5694](https://github.com/opensearch-project/security/pull/5694))
+* Optimize the Fls/Dls/FieldMasking data structure to only include the concrete indices from the current request ([#5482](https://github.com/opensearch-project/security/pull/5482))
+* Ensure that IndexResolverReplacer resolves to indices for RolloverRequests ([#5522](https://github.com/opensearch-project/security/pull/5522))
+* Add 'good' as a valid value for plugins.security.restapi.password_score_based_validation_strength ([#5523](https://github.com/opensearch-project/security/pull/5523))
+* Use FilterLeafReader based DLS for parent/child queries ([#5538](https://github.com/opensearch-project/security/pull/5538))
+* Fixed index resolution for rollover requests ([#5526](https://github.com/opensearch-project/security/pull/5526))
+* Fixed TLS endpoint identification by SAN ([#5669](https://github.com/opensearch-project/security/pull/5669))
+* Avoid ConcurrentModificationException for User class fields ([#5615](https://github.com/opensearch-project/security/pull/5615))
+
+### Maintenance
+* Bump `com.nimbusds:nimbus-jose-jwt:9.48` from 9.48 to 10.0.2 ([#5480](https://github.com/opensearch-project/security/pull/5480))
+* Bump `checkstyle` from 10.3.3 to 10.26.1 ([#5480](https://github.com/opensearch-project/security/pull/5480))
+* Add tenancy access info to serialized user in threadcontext ([#5519](https://github.com/opensearch-project/security/pull/5519))
+* Optimized wildcard matching runtime performance ([#5543](https://github.com/opensearch-project/security/pull/5543))
+* Always install demo certs if configured with demo certs ([#5517](https://github.com/opensearch-project/security/pull/5517))
+* Bump org.apache.zookeeper:zookeeper from 3.9.3 to 3.9.4 ([#5689](https://github.com/opensearch-project/security/pull/5689))