doc: update Mesteery email

PR-URL: #41683
Reviewed-By: Antoine du Hamel <[email protected]>
Reviewed-By: Benjamin Gruenbaum <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: James M Snell <[email protected]>

Author: Mesteery

README.md

@@ -649,7 +649,7 @@ maintaining the Node.js project.
 * [marsonya](https://github.com/marsonya) -
   **Akhil Marsonya** <<[email protected]>> (he/him)
 * [Mesteery](https://github.com/Mesteery) -
-  **Mestery** <<mestery@pm.me>>
+  **Mestery** <<mestery@protonmail.com>> (he/him)
 * [PoojaDurgad](https://github.com/PoojaDurgad) -
   **Pooja Durgad** <<[email protected]>>
 * [RaisinTen](https://github.com/RaisinTen) -