[builtins] fix Allocate() call in ReduceStringIterator()

src/compiler/js-builtin-reducer.cc

Index: src/compiler/js-builtin-reducer.cc
diff --git a/src/compiler/js-builtin-reducer.cc b/src/compiler/js-builtin-reducer.cc
index edf63ba262d55b2afb7dbd2b42886ba83b5b38d2..8b19afb0da0a59ba2bbe1fb4d0c15bcddf8f55e7 100644
--- a/src/compiler/js-builtin-reducer.cc
+++ b/src/compiler/js-builtin-reducer.cc
@@ -1047,7 +1047,7 @@ Reduction JSBuiltinReducer::ReduceStringIterator(Node* node) {
         common()->BeginRegion(RegionObservability::kNotObservable), effect);
     Node* value = effect = graph()->NewNode(
         simplified()->Allocate(NOT_TENURED),
-        jsgraph()->Int32Constant(JSStringIterator::kSize), effect, control);
+        jsgraph()->Constant(JSStringIterator::kSize), effect, control);
     effect = graph()->NewNode(simplified()->StoreField(AccessBuilder::ForMap()),
                               value, map, effect, control);
     effect = graph()->NewNode(