LibJS: Convert AsyncFromSyncIterator::create() to NonnullGCPtr

Author: https://github.com/linusg
Commit: 6528cbf51b
Pull-request: https://github.com/SerenityOS/serenity/pull/16479
Reviewed-by: https://github.com/davidot ✅

Userland/Libraries/LibJS/Runtime/AsyncFromSyncIterator.h

@@ -17,7 +17,7 @@ class AsyncFromSyncIterator final : public Object {
     JS_OBJECT(AsyncFromSyncIterator, Object);
 
 public:
-    static AsyncFromSyncIterator* create(Realm&, Iterator sync_iterator_record);
+    static NonnullGCPtr<AsyncFromSyncIterator> create(Realm&, Iterator sync_iterator_record);
 
     virtual void initialize(Realm&) override;
     virtual ~AsyncFromSyncIterator() override = default;