Update CHANGELOG-3.0.md

Signed-off-by: John Mazanec <[email protected]>

Author: jmazanec15

CHANGELOG-3.0.md

@@ -26,7 +26,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - [Star Tree] [Search] Resolving keyword & numeric bucket aggregation with metric aggregation using star-tree ([#17165](https://github.com/opensearch-project/OpenSearch/pull/17165))
 - Added error handling support for the pull-based ingestion ([#17427](https://github.com/opensearch-project/OpenSearch/pull/17427))
 - Added Warm index setting and Updated nomenclature to differentiate between hot and warm tiering implementation ([#17490](https://github.com/opensearch-project/OpenSearch/pull/17490))
-- Add dfs transformation function in XContentMapValues ([#TBD](https://github.com/opensearch-project/OpenSearch/pull/TBD))
+- Add dfs transformation function in XContentMapValues ([#17612](https://github.com/opensearch-project/OpenSearch/pull/17612))
 
 ### Dependencies
 - Update Apache Lucene to 10.1.0 ([#16366](https://github.com/opensearch-project/OpenSearch/pull/16366))