Add maintainers (#33)

* feat: add maintainers

Signed-off-by: SuZhou-Joe <[email protected]>

* feat: format

Signed-off-by: SuZhou-Joe <[email protected]>

---------

Signed-off-by: SuZhou-Joe <[email protected]>

Author: SuZhou-Joe

.github/CODEOWNERS

@@ -1,2 +1,2 @@
 # This should match the owning team set up in https://github.com/orgs/opensearch-project/teams
-*   @lezzago @joshuali925 @anirudha @ruanyl @SuZhou-Joe @xluo-aws
+*   @lezzago @joshuali925 @anirudha @ruanyl @SuZhou-Joe @xluo-aws @gaobinlong @Hailong-am @wanglam @raintygao

MAINTAINERS.md

@@ -12,3 +12,7 @@ This document contains a list of maintainers in this repo. See [opensearch-proje
 | Yulong Ruan     | [ruanyl](https://github.com/ruanyl)           | Amazon      |
 | Su Zhou         | [SuZhou-Joe](https://github.com/SuZhou-Joe)   | Amazon      |
 | Xuesong Luo     | [xluo-aws](https://github.com/xluo-aws)       | Amazon      |
+| Binlong Gao     | [gaobinlong](https://github.com/gaobinlong)   | Amazon      |
+| Hailong Cui     | [Hailong-am](https://github.com/Hailong-am)   | Amazon      |
+| Lin Wang        | [wanglam](https://github.com/wanglam)         | Amazon      |
+| Tianyu Gao      | [raintygao](https://github.com/raintygao)     | Amazon      |