meta: add tsc and build team as codeowners building.md

PR-URL: #59298
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Ruy Adorno <ruy@vlt.sh>
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>

Author: RafaelGSS

.github/CODEOWNERS

@@ -18,6 +18,7 @@
 /doc/contributing/**/*@nodejs/tsc
 /GOVERNANCE.md@nodejs/tsc
 /SECURITY.md@nodejs/tsc
+/BUILDING.md@nodejs/build@nodejs/tsc
 /LICENSE@nodejs/tsc
 /onboarding.md@nodejs/tsc