Add 2.19.1 to version history (#9311) (#9315)

_about/version-history.md

@@ -9,6 +9,7 @@ permalink: /version-history/
 
 OpenSearch version | Release highlights | Release date  
 :--- | :--- | :--- 
+[2.19.1](https://github.com/opensearch-project/opensearch-build/blob/main/release-notes/opensearch-release-notes-2.19.1.md) |  Adds execution hint for cardinality aggregator. Includes bug fixes for ML Commons, Query Insights Dashboards, and Remote Metadata SDK. Contains maintenance updates for several components. For a full list of release highlights, see the Release Notes. | 27 February 2025
 [2.19.0](https://github.com/opensearch-project/opensearch-build/blob/main/release-notes/opensearch-release-notes-2.19.0.md) | Adds workload management, additional query insights, and template queries. Introduces a query insights page to OpenSearch Dashboards. Includes improvements and bug fixes to snapshots, search statistics, star-tree search, and index management. For a full list of release highlights, see the Release Notes. | 11 February 2025
 [2.18.0](https://github.com/opensearch-project/opensearch-build/blob/main/release-notes/opensearch-release-notes-2.18.0.md) | Adds a redesigned home page, updated Discover interface, and collaborative workspaces to OpenSearch Dashboards. Includes improvements to ML inference processor and query grouping. Introduces reranking by field and paginated CAT APIs. Includes experimental OpenSearch Dashboards Assistant capabilities. For a full list of release highlights, see the Release Notes. | 05 November 2024
 [2.17.1](https://github.com/opensearch-project/opensearch-build/blob/main/release-notes/opensearch-release-notes-2.17.1.md) | Includes bug fixes for ML Commons, anomaly detection, k-NN, and security analytics. Adds various infrastructure and maintenance updates. For a full list of release highlights, see the Release Notes. | 1 October 2024