docs: add version badge to tree dnd docs + fix render props example (#8347)

* add version badge to tree dnd docs

* fix render props docs example

Author: reidbarber

packages/react-aria-components/docs/Tree.mdx

@@ -767,7 +767,7 @@ Use the `renderEmptyState` prop to customize what the `Tree` will display if the
 
 </details>
 
-## Drag and drop
+## Drag and drop <VersionBadge version="beta" style={{marginLeft: 4, verticalAlign: 'bottom'}} />
 
 Tree supports drag and drop interactions when the `dragAndDropHooks` prop is provided using the <TypeLink links={docs.links} type={docs.exports.useDragAndDrop} /> hook. Users can drop data on the tree as a whole, on individual items, insert new items between existing ones, or move items within the tree hierarchy.
 
@@ -1877,12 +1877,14 @@ Render props may also be used as children to alter what elements are rendered ba
 
 ```jsx
 <TreeItem>
-  {({selectionMode}) => (
     <TreeItemContent>
-      {selectionMode !== 'none' && <Checkbox />}
-      Item
+      {({selectionMode}) => (
+        <>
+          {selectionMode !== 'none' && <Checkbox />}
+          Item
+        </>
+      )}
     </TreeItemContent>
-  )}
 </TreeItem>
 ```