LibJS: Convert AggregateError::create() to NonnullGCPtr

Author: https://github.com/linusg
Commit: 0c50751c13
Pull-request: https://github.com/SerenityOS/serenity/pull/16479
Reviewed-by: https://github.com/davidot ✅

Userland/Libraries/LibJS/Runtime/AggregateError.cpp

@@ -10,9 +10,9 @@
 
 namespace JS {
 
-AggregateError* AggregateError::create(Realm& realm)
+NonnullGCPtr<AggregateError> AggregateError::create(Realm& realm)
 {
-    return realm.heap().allocate<AggregateError>(realm, *realm.intrinsics().aggregate_error_prototype());
+    return *realm.heap().allocate<AggregateError>(realm, *realm.intrinsics().aggregate_error_prototype());
 }
 
 AggregateError::AggregateError(Object& prototype)