Add Peter Nied as a Maintainer (opensearch-project#9765)

Signed-off-by: Daniel Widdis <widdis@gmail.com>
Signed-off-by: Ivan Brusic <ivan.brusic@flocksafety.com>

.github/CODEOWNERS

@@ -1 +1 @@
-*   @reta @anasalkouz @andrross @reta @Bukhtawar @CEHENKLE @dblock @gbbafna @setiah @kartg @kotwanikunal @mch2 @nknize @owaiskazi19 @Rishikesh1159 @ryanbogan @saratvemulapalli @shwetathareja @dreamer-89 @tlfeng @VachaShah @dbwiddis @sachinpkale @sohami @msfroh
+*   @reta @anasalkouz @andrross @Bukhtawar @CEHENKLE @dblock @gbbafna @setiah @kartg @kotwanikunal @mch2 @nknize @owaiskazi19 @peternied @Rishikesh1159 @ryanbogan @saratvemulapalli @shwetathareja @dreamer-89 @tlfeng @VachaShah @dbwiddis @sachinpkale @sohami @msfroh

MAINTAINERS.md

@@ -22,6 +22,7 @@ This document contains a list of maintainers in this repo. See [opensearch-proje
 | Michael Froh             | [msfroh](https://github.com/msfroh)                     | Amazon      |
 | Nick Knize               | [nknize](https://github.com/nknize)                     | Amazon      |
 | Owais Kazi               | [owaiskazi19](https://github.com/owaiskazi19)           | Amazon      |
+| Peter Nied               | [peternied](https://github.com/peternied)               | Amazon      |
 | Rabi Panda               | [adnapibar](https://github.com/adnapibar)               | Independent |
 | Rishikesh Pasham         | [Rishikesh1159](https://github.com/Rishikesh1159)       | Amazon      |
 | Ryan Bogan               | [ryanbogan](https://github.com/ryanbogan)               | Amazon      |