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

PR-URL: #59298
Reviewed-By: Antoine du Hamel <[email protected]>
Reviewed-By: Marco Ippolito <[email protected]>
Reviewed-By: Ruy Adorno <[email protected]>
Reviewed-By: Darshan Sen <[email protected]>
Reviewed-By: Chengzhong Wu <[email protected]>
Reviewed-By: Matteo Collina <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

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