Adding @dreamer-89 to Opensearch maintainers. (opensearch-project#4342)

Signed-off-by: Kartik Ganesh <gkart@amazon.com>

Signed-off-by: Kartik Ganesh <gkart@amazon.com>

Author: kartg

CHANGELOG.md

@@ -4,6 +4,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 ## [Unreleased]
 ### Added
 - Github workflow for changelog verification ([#4085](https://github.com/opensearch-project/OpenSearch/pull/4085))
+- Added @dreamer-89 as an Opensearch maintainer ([#4342](https://github.com/opensearch-project/OpenSearch/pull/4342))
 
 ### Changed
 - Dependency updates (httpcore, mockito, slf4j, httpasyncclient, commons-codec) ([#4308](https://github.com/opensearch-project/OpenSearch/pull/4308))

MAINTAINERS.md

@@ -23,6 +23,7 @@
 | Ryan Bogan | [ryanbogan](https://github.com/ryanbogan) | Amazon |
 | Sarat Vemulapalli | [saratvemulapalli](https://github.com/saratvemulapalli) | Amazon |
 | Shweta Thareja |[shwetathareja](https://github.com/shwetathareja) | Amazon |
+| Suraj Singh |[dreamer-89](https://github.com/dreamer-89) | Amazon |
 | Tianli Feng | [tlfeng](https://github.com/tlfeng) | Amazon |
 | Vacha Shah | [VachaShah](https://github.com/VachaShah) | Amazon |
 | Xue Zhou | [xuezhou25](https://github.com/xuezhou25) | Amazon |