Bump jdk to 21 for maven snapshot build (#1909)

* Bump jdk to 21 for maven snapshot build

Signed-off-by: Shenoy Pratik <[email protected]>

* update maintainers

Signed-off-by: Shenoy Pratik <[email protected]>

---------

Signed-off-by: Shenoy Pratik <[email protected]>

Author: ps48

.github/workflows/maven-publish.yml

@@ -20,7 +20,7 @@ jobs:
       - uses: actions/setup-java@v3
         with:
           distribution: temurin # Temurin is a distribution of adoptium
-          java-version: 11
+          java-version: 21
       - uses: actions/checkout@v3
       - uses: aws-actions/configure-aws-credentials@v1
         with:

MAINTAINERS.md

@@ -16,19 +16,18 @@ This document contains a list of maintainers in this repo. See [opensearch-proje
 | Peter Fitzgibbons | [pjfitzgibbons](https://github.com/pjfitzgibbons) | Amazon      |
 | Simeon Widdis     | [swiddis](https://github.com/swiddis)             | Amazon      |
 | Chen Dai          | [dai-chen](https://github.com/dai-chen)           | Amazon      |
-| Vamsi Manohar     | [vamsi-amazon](https://github.com/vamsi-amazon)   | Amazon      |
+| Vamsi Manohar     | [vamsi-amazon](https://github.com/vamsimanohar)   | Amazon      |
 | Peng Huo          | [penghuo](https://github.com/penghuo)             | Amazon      |
 | Sean Kao          | [seankao-az](https://github.com/seankao-az)       | Amazon      |
 | Anirudha Jadhav   | [anirudha](https://github.com/anirudha)           | Amazon      |
 
-
 ## Emeritus Maintainers
 
-| Maintainer        | GitHub ID                                               | Affiliation |
-| ----------------- | ------------------------------------------------------- | ----------- |
-| Charlotte Henkle  | [CEHENKLE](https://github.com/CEHENKLE)                 | Amazon      |
-| Nick Knize        | [nknize](https://github.com/nknize)                     | Amazon      |
-| David Cui         | [davidcui1225](https://github.com/davidcui1225)         | Amazon      |
-| Eugene Lee        | [eugenesk24](https://github.com/eugenesk24)             | Amazon      |
-| Zhongnan Su       | [zhongnansu](https://github.com/zhongnansu)             | Amazon      |
-| Sean Li           | [sejli](https://github.com/sejli)                       | Amazon      |
+| Maintainer       | GitHub ID                                       | Affiliation |
+| ---------------- | ----------------------------------------------- | ----------- |
+| Charlotte Henkle | [CEHENKLE](https://github.com/CEHENKLE)         | Amazon      |
+| Nick Knize       | [nknize](https://github.com/nknize)             | Amazon      |
+| David Cui        | [davidcui1225](https://github.com/davidcui1225) | Amazon      |
+| Eugene Lee       | [eugenesk24](https://github.com/eugenesk24)     | Amazon      |
+| Zhongnan Su      | [zhongnansu](https://github.com/zhongnansu)     | Amazon      |
+| Sean Li          | [sejli](https://github.com/sejli)               | Amazon      |