doc: add Rafael to sec release stewards

PR-URL: #52354
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Michael Dawson <midawson@redhat.com>
Reviewed-By: Yagiz Nizipli <yagiz.nizipli@sentry.io>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Ulises Gascón <ulisesgascongonzalez@gmail.com>
Reviewed-By: Ruy Adorno <ruy@vlt.sh>

doc/contributing/security-release-process.md

@@ -32,6 +32,7 @@ The current security stewards are documented in the main Node.js
 | NearForm     | Rafael          | 2023-Aug-09  |
 | NearForm     | Rafael          | 2023-Oct-13  |
 | NodeSource   | Rafael          | 2024-Feb-14  |
+| NodeSource   | Rafael          | 2024-Apr-03  |
 | Datadog      | Bryan           |              |
 | IBM          | Joe             |              |
 | Platformatic | Matteo          |              |