Add @kkewwei as a maintainer (#18384)

Signed-off-by: Michael Froh <msfroh@apache.org>

Author: msfroh

MAINTAINERS.md

@@ -18,6 +18,7 @@ This document contains a list of maintainers in this repo. See [opensearch-proje
 | Binlong Gao       | [gaobinlong](https://github.com/gaobinlong)             | Amazon      |
 | Gaurav Bafna      | [gbbafna](https://github.com/gbbafna)                   | Amazon      |
 | Jay Deng          | [jed326](https://github.com/jed326)                     | Amazon      |
+| Ke Wei            | [kkewwei](https://github.com/kkewwei)                   | ByteDance   |
 | Kunal Kotwani     | [kotwanikunal](https://github.com/kotwanikunal)         | Amazon      |
 | Varun Bansal      | [linuxpi](https://github.com/linuxpi)                   | Amazon      |
 | Marc Handalian    | [mch2](https://github.com/mch2)                         | Amazon      |