Add @zhongnansu as maintainer (#2590)

Signed-off-by: Kristen Tian <tyarong@amazon.com>

Signed-off-by: Kristen Tian <tyarong@amazon.com>

Author: kristenTian

CHANGELOG.md

@@ -39,6 +39,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 ### 📝 Documentation
 
 ### 🛠 Maintenance
+* Adding @zhongnansu as maintainer. ([#2590](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/2590))
 
 ### 🪛 Refactoring
 

MAINTAINERS.md

@@ -14,6 +14,7 @@
 | Abby Hu | [abbyhu2000](https://github.com/abbyhu2000) | Amazon |
 | Yan Zeng | [zengyan-amazon](https://github.com/zengyan-amazon) | Amazon |
 | Kristen Tian | [kristenTian](https://github.com/kristenTian) | Amazon |
+| Zhongnan Su | [zhongnansu](https://github.com/zhongnansu) | Amazon |
 
 ## Emeritus