meta: add @nodejs/actions as CODEOWNERS

PR-URL: #39119
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Antoine du Hamel <[email protected]>
Reviewed-By: Jiawen Geng <[email protected]>
Reviewed-By: Zijian Liu <[email protected]>

Author: mmarchini

.github/CODEOWNERS

@@ -118,3 +118,8 @@
 # V8
 /deps/v8/* @nodejs/v8-update
 /tools/v8_gypfiles/* @nodejs/v8-update
+
+# Actions
+
+/.github/workflows/* @nodejs/actions
+/tools/actions/* @nodejs/actions