Add @SuZhou-Joe as a maintainer (#5594)

Updates MAINTAINERS.md and .github/CODEOWNERS.

Here are their current merge contributions, total contributions, and issues:
https://github.com/opensearch-project/OpenSearch-Dashboards/pulls?q=is%3Apr+is%3Amerged+author%3Asuzhou-joe+
https://github.com/opensearch-project/OpenSearch-Dashboards/pulls?q=is%3Apr+author%3Asuzhou-joe+
https://github.com/opensearch-project/OpenSearch-Dashboards/issues?q=is%3Aissue+suzhou-joe+is%3Aopen

Signed-off-by: Kawika Avilla <kavilla414@gmail.com>

.github/CODEOWNERS

@@ -1 +1 @@
-*   @ananzh @kavilla @seanneumann @AMoo-Miki @ashwin-pc @joshuarrrr @abbyhu2000 @zengyan-amazon @kristenTian @zhongnansu @manasvinibs @ZilongX @Flyingliuhub @BSFishy @curq @bandinib-amzn
+*   @ananzh @kavilla @seanneumann @AMoo-Miki @ashwin-pc @joshuarrrr @abbyhu2000 @zengyan-amazon @kristenTian @zhongnansu @manasvinibs @ZilongX @Flyingliuhub @BSFishy @curq @bandinib-amzn @SuZhou-Joe

CHANGELOG.md

@@ -57,6 +57,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Bump `js-yaml` from `3.14.0` to `4.1.0` ([#3770](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3770))
 - Replace `node-sass` with `sass-embedded` ([#5338](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/5338))
 - Bump `chromedriver` from `107.0.3` to `119.0.1` ([#5465](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/5465))
+- Add @SuZhou-Joe as a maintainer. ([#5594](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/5594))
 
 ### 🪛 Refactoring
 

MAINTAINERS.md

@@ -22,6 +22,7 @@ This document contains a list of maintainers in this repo. See [opensearch-proje
 | Matt Provost              | [BSFishy](https://github.com/BSFishy)               | Amazon      |
 | Sirazh Gabdullin          | [curq](https://github.com/curq)                     | External contributor |
 | Bandini Bhopi             | [bandinib-amzn](https://github.com/bandinib-amzn)   | Amazon      |
+| Su Zhou                   | [SuZhou-Joe](https://github.com/SuZhou-Joe)         | Amazon      |
 
 ## Emeritus