[docs] Synchronize docs for ArrayFieldItemTemplate

CHANGELOG.md

@@ -15,6 +15,12 @@ it according to semantic versioning. For example, if your PR adds a breaking cha
 should change the heading of the (upcoming) version to include a major version bump.
 
 -->
+# 5.24.9
+
+## Dev / docs / playground
+
+- Updated docs for ArrayFieldItemTemplate to include prop `onCopyIndexClick`, fixing [#4507](https://github.com/rjsf-team/react-jsonschema-form/issues/4507)
+
 # 5.24.8
 
 ## @rjsf/antd

packages/docs/docs/advanced-customization/custom-templates.md

@@ -225,6 +225,7 @@ The following props are passed to each `ArrayFieldItemTemplate`:
 - `totalItems`: A number stating the total number `items` in the array.
 - `key`: A stable, unique key for the array item.
 - `onAddIndexClick: (index) => (event?) => void`: Returns a function that adds a new item at `index`.
+- `onCopyIndexClick: (index) => (event?) => void`: Returns a function that copies the item at `index` into the position at `index + 1`
 - `onDropIndexClick: (index) => (event?) => void`: Returns a function that removes the item at `index`.
 - `onReorderClick: (index, newIndex) => (event?) => void`: Returns a function that swaps the items at `index` with `newIndex`.
 - `readonly`: A boolean value stating if the array item is read-only.