Updated MAINTAINERS.md to match recommended opensearch-project format. (

#5)

Signed-off-by: dblock <[email protected]>

Signed-off-by: dblock <[email protected]>

MAINTAINERS.md

@@ -1,5 +1,9 @@
-## Maintainers
+## Overview
 
-| Maintainer       | GitHub ID                                           | Affiliation |
-| ---------------- | --------------------------------------------------- | ----------- |
-| Rishabh Singh    | [rishabh6788](https://github.com/rishabh6788)       | Amazon      |
+This document contains a list of maintainers in this repo. See [opensearch-project/.github/RESPONSIBILITIES.md](https://github.com/opensearch-project/.github/blob/main/RESPONSIBILITIES.md#maintainer-responsibilities) that explains what the role of maintainer means, what maintainers do in this and other repos, and how they should be doing it. If you're interested in contributing, and becoming a maintainer, see [CONTRIBUTING](CONTRIBUTING.md).
+
+## Current Maintainers
+
+| Maintainer    | GitHub ID                                     | Affiliation |
+| ------------- | --------------------------------------------- | ----------- |
+| Rishabh Singh | [rishabh6788](https://github.com/rishabh6788) | Amazon      |