vm: freeze dependencySpecifiers array

PR-URL: nodejs#49720
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>

Author: aduh95

lib/internal/vm/module.js

@@ -7,6 +7,7 @@ const {
   ArrayPrototypeIndexOf,
   ArrayPrototypeSome,
   ObjectDefineProperty,
+  ObjectFreeze,
   ObjectGetPrototypeOf,
   ObjectSetPrototypeOf,
   ReflectApply,
@@ -340,9 +341,7 @@ class SourceTextModule extends Module {
     if (this[kWrap] === undefined) {
       throw new ERR_VM_MODULE_NOT_MODULE();
     }
-    if (this[kDependencySpecifiers] === undefined) {
-      this[kDependencySpecifiers] = this[kWrap].getStaticDependencySpecifiers();
-    }
+    this[kDependencySpecifiers] ??= ObjectFreeze(this[kWrap].getStaticDependencySpecifiers());
     return this[kDependencySpecifiers];
   }