meta: ping startup and realm team on src/node_realm* changes

PR-URL: #47448
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>

Author: joyeecheung

.github/CODEOWNERS

@@ -117,6 +117,7 @@
 
 /benchmark/misc/startup.js @nodejs/startup
 /src/node.cc @nodejs/startup
+/src/node_realm* @nodejs/startup @nodejs/realm
 /src/node_builtins* @nodejs/startup
 /src/node_snapshot* @nodejs/startup
 /lib/internal/bootstrap/* @nodejs/startup