Adds release notes for 2.16 (opensearch-project#844)

Signed-off-by: Tejas Shah <[email protected]>
(cherry picked from commit d7dda9a)

CHANGELOG.md

@@ -12,20 +12,11 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Maintenance
 ### Refactoring
 
-## [Unreleased 2.x](https://github.com/opensearch-project/neural-search/compare/2.14...2.x)
+## [Unreleased 2.x](https://github.com/opensearch-project/neural-search/compare/2.16...2.x)
 ### Features
-- Speed up NeuralSparseQuery by two-phase using a custom search pipeline.([#646](https://github.com/opensearch-project/neural-search/issues/646))
-- Support batchExecute in TextEmbeddingProcessor and SparseEncodingProcessor ([#743](https://github.com/opensearch-project/neural-search/issues/743))
 ### Enhancements
-- Pass empty doc collector instead of top docs collector to improve hybrid query latencies by 20% ([#731](https://github.com/opensearch-project/neural-search/pull/731))
-- Optimize parameter parsing in text chunking processor ([#733](https://github.com/opensearch-project/neural-search/pull/733))
-- Use lazy initialization for priority queue of hits and scores to improve latencies by 20% ([#746](https://github.com/opensearch-project/neural-search/pull/746))
-- Optimize max score calculation in the Query Phase of the Hybrid Search ([765](https://github.com/opensearch-project/neural-search/pull/765))
 ### Bug Fixes
-- Total hit count fix in Hybrid Query ([756](https://github.com/opensearch-project/neural-search/pull/756))
-- Fix map type validation issue in multiple pipeline processors ([#661](https://github.com/opensearch-project/neural-search/pull/661))
 ### Infrastructure
-- Disable memory circuit breaker for integ tests ([#770](https://github.com/opensearch-project/neural-search/pull/770))
 ### Documentation
 ### Maintenance
 ### Refactoring

release-notes/opensearch-neural-search.release-notes-2.16.0.0.md

@@ -0,0 +1,19 @@
+## Version 2.16.0.0 Release Notes
+
+Compatible with OpenSearch 2.16.0
+
+### Features
+- Enable sorting and search_after features in Hybrid Search [#827](https://github.com/opensearch-project/neural-search/pull/827)
+### Enhancements
+- InferenceProcessor inherits from AbstractBatchingProcessor to support sub batching in processor [#820](https://github.com/opensearch-project/neural-search/pull/820)
+- Adds dynamic knn query parameters efsearch and nprobes [#814](https://github.com/opensearch-project/neural-search/pull/814/)
+- Enable '.' for nested field in text embedding processor ([#811](https://github.com/opensearch-project/neural-search/pull/811))
+- Enhance syntax for nested mapping in destination fields([#841](https://github.com/opensearch-project/neural-search/pull/841))
+### Bug Fixes
+- Fix function names and comments in the gradle file for BWC tests ([#795](https://github.com/opensearch-project/neural-search/pull/795/files))
+- Fix for missing HybridQuery results when concurrent segment search is enabled ([#800](https://github.com/opensearch-project/neural-search/pull/800))
+### Infrastructure
+- Add BWC for batch ingestion ([#769](https://github.com/opensearch-project/neural-search/pull/769))
+- Add backward test cases for neural sparse two phase processor ([#777](https://github.com/opensearch-project/neural-search/pull/777))
+- Fix CI for JDK upgrade towards 21 ([#835](https://github.com/opensearch-project/neural-search/pull/835))
+- Maven publishing workflow by upgrade jdk to 21 ([#837](https://github.com/opensearch-project/neural-search/pull/837))