Add 2.11.1 release notes (#11284)

Signed-off-by: Andrew Ross <[email protected]>

CHANGELOG.md

@@ -134,12 +134,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - [BUG] Fix java.lang.SecurityException in repository-gcs plugin ([#10642](https://github.com/opensearch-project/OpenSearch/pull/10642))
 - Add telemetry tracer/metric enable flag and integ test. ([#10395](https://github.com/opensearch-project/OpenSearch/pull/10395))
 - Add instrumentation for indexing in transport bulk action and transport shard bulk action. ([#10273](https://github.com/opensearch-project/OpenSearch/pull/10273))
-- [BUG] Disable sort optimization for HALF_FLOAT ([#10999](https://github.com/opensearch-project/OpenSearch/pull/10999))
 - Refactor common parts from the Rounding class into a separate 'round' package ([#11023](https://github.com/opensearch-project/OpenSearch/issues/11023))
 - Performance improvement for MultiTerm Queries on Keyword fields ([#7057](https://github.com/opensearch-project/OpenSearch/issues/7057))
 - Disable concurrent aggs for Diversified Sampler and Sampler aggs ([#11087](https://github.com/opensearch-project/OpenSearch/issues/11087))
 - Made leader/follower check timeout setting dynamic ([#10528](https://github.com/opensearch-project/OpenSearch/pull/10528))
-- Use iterative approach to evaluate Regex.simpleMatch ([#11060](https://github.com/opensearch-project/OpenSearch/pull/11060))
 
 ### Deprecated
 
@@ -153,7 +151,6 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Fix some test methods in SimulatePipelineRequestParsingTests never run and fix test failure ([#10496](https://github.com/opensearch-project/OpenSearch/pull/10496))
 - Fix passing wrong parameter when calling newConfigurationException() in DotExpanderProcessor ([#10737](https://github.com/opensearch-project/OpenSearch/pull/10737))
 - Fix SuggestSearch.testSkipDuplicates by forceing refresh when indexing its test documents ([#11068](https://github.com/opensearch-project/OpenSearch/pull/11068))
-- Adding version condition while adding geoshape doc values to the index, to ensure backward compatibility.([#11095](https://github.com/opensearch-project/OpenSearch/pull/11095))
 - Fix per request latency last phase not tracked ([#10934](https://github.com/opensearch-project/OpenSearch/pull/10934))
 
 ### Security

release-notes/opensearch.release-notes-2.11.1.md

@@ -0,0 +1,10 @@
+## 2023-11-20 Version 2.11.1 Release Notes
+
+## [2.11.1]
+
+### Changed
+- Use iterative approach to evaluate Regex.simpleMatch ([#11060](https://github.com/opensearch-project/OpenSearch/pull/11060))
+
+### Fixed
+- [BUG] Disable sort optimization for HALF_FLOAT ([#10999](https://github.com/opensearch-project/OpenSearch/pull/10999))
+- Adding version condition while adding geoshape doc values to the index, to ensure backward compatibility.([#11095](https://github.com/opensearch-project/OpenSearch/pull/11095))