Add paul and Sumukh as maintainers and codeowners (#200)

Signed-off-by: Derek Ho <dxho@amazon.com>

.github/CODEOWNERS

@@ -1,2 +1,2 @@
 # This should match the owning team set up in https://github.com/orgs/opensearch-project/teams
-*   @pjfitzgibbons @ps48 @kavithacm @derek-ho @joshuali925 @dai-chen @YANG-DB @rupal-bq @mengweieric @vamsi-amazon @swiddis @penghuo @seankao-az @MaxKsyunz @Yury-Fridlyand @anirudha
+*   @pjfitzgibbons @ps48 @kavithacm @derek-ho @joshuali925 @dai-chen @YANG-DB @rupal-bq @mengweieric @vamsi-amazon @swiddis @penghuo @seankao-az @MaxKsyunz @Yury-Fridlyand @anirudha @paulstn @sumukhswamy

MAINTAINERS.md

@@ -22,6 +22,9 @@ This document contains a list of maintainers in this repo. See [opensearch-proje
 | Max Ksyunz        | [MaxKsyunz](https://github.com/MaxKsyunz)           | BitQuill    |
 | Yury Fridlyand    | [Yury-Fridlyand](https://github.com/Yury-Fridlyand) | BitQuill    |
 | Anirudha Jadhav   | [anirudha](https://github.com/anirudha)             | Amazon      |
+| Paul Sebastian          | [paulstn](https://github.com/paulstn)             | Amazon      |
+| Sumukh Hanumantha Swamy | [sumukhswamy](https://github.com/sumukhswamy)     | Amazon      |
+
 
 ## Emeritus Maintainers