doc: add support link for mcollina

Signed-off-by: Matteo Collina <hello@matteocollina.com>
PR-URL: #54786
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jake Yuesong Li <jake.yuesong@gmail.com>
Reviewed-By: Steven R Loomis <srl295@gmail.com>

README.md

@@ -391,7 +391,7 @@ For information about the governance of the Node.js project, see
 * [MattiasBuelens](https://github.com/MattiasBuelens) -
   **Mattias Buelens** <<mattias@buelens.com>> (he/him)
 * [mcollina](https://github.com/mcollina) -
-  **Matteo Collina** <<matteo.collina@gmail.com>> (he/him)
+  **Matteo Collina** <<matteo.collina@gmail.com>> (he/him) - [Support me](https://github.com/sponsors/mcollina)
 * [meixg](https://github.com/meixg) -
   **Xuguang Mei** <<meixuguang@gmail.com>> (he/him)
 * [mhdawson](https://github.com/mhdawson) -