Update ADMINS.md (#18445)

The current list of admins is stale. This change directly points to the project's admin page to avoid redundancy.

Also, reworded it a bit.

Signed-off-by: Sandesh Kumar <[email protected]>

Author: sandeshkr419

ADMINS.md

@@ -1,7 +1,3 @@
 ## Admins
 
-| Admin           | GitHub ID                               | Affiliation |
-| --------------- | --------------------------------------- | ----------- |
-| Henri Yandell   | [hyandell](https://github.com/hyandell) | Amazon      |
-
-[This document](https://github.com/opensearch-project/.github/blob/main/ADMINS.md) explains what admins do in this repo. and how they should be doing it. If you're interested in becoming a maintainer, see [MAINTAINERS](MAINTAINERS.md). If you're interested in contributing, see [CONTRIBUTING](CONTRIBUTING.md).
+Kindly refer to [ADMINS.md](https://github.com/opensearch-project/.github/blob/main/ADMINS.md) for opensearch-project administrators, their responsibilities in this repository, and their operational procedures. If you're interested in becoming a maintainer, see [MAINTAINERS](MAINTAINERS.md). If you're interested in contributing, see [CONTRIBUTING](CONTRIBUTING.md).