doc: add Mesteery to triagers

PR-URL: #39887
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Zijian Liu <lxxyxzj@gmail.com>

Author: Mesteery

README.md

@@ -624,6 +624,8 @@ maintaining the Node.js project.
 **Himadri Ganguly** <himadri.tech@gmail.com> (he/him)
 * [marsonya](https://github.com/marsonya) -
 **Akhil Marsonya** <akhil.marsonya27@gmail.com> (he/him)
+* [Mesteery](https://github.com/Mesteery) -
+**Mestery** <mestery@pm.me>
 * [PoojaDurgad](https://github.com/PoojaDurgad) -
 **Pooja Durgad** <Pooja.D.P@ibm.com>
 * [RaisinTen](https://github.com/RaisinTen) -