Update type annotation in ListBox example and fix style formatting in ListBox story

Author: hasegawa-101

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

@@ -415,6 +415,7 @@ ListBox supports custom keyboard event handling on individual items via the `onK
 
 ```tsx example
 import {useListData} from 'react-stately';
+import type {Key} from 'react-aria-components';
 
 function Example() {
   let list = useListData({
@@ -427,7 +428,7 @@ function Example() {
     ]
   });
 
-  let handleKeyDown = (key: React.Key) => (e: React.KeyboardEvent) => {
+  let handleKeyDown = (key: Key) => (e: React.KeyboardEvent) => {
     if (e.key === 'Delete' || e.key === 'Backspace') {
       e.preventDefault();
       list.remove(key);

packages/react-aria-components/stories/ListBox.stories.tsx

@@ -832,7 +832,7 @@ export const ListBoxWithKeyboardDelete: ListBoxStory = () => {
   };
 
   return (
-    <div style={{display: 'flex', flexDirection: 'column',alignItems: 'center', gap: 12}}>
+    <div style={{display: 'flex', flexDirection: 'column', alignItems: 'center', gap: 12}}>
       <div style={{padding: 12, background: '#f0f0f0', borderRadius: 4}}>
         Press <Keyboard>Delete</Keyboard> or <Keyboard>Backspace</Keyboard> to remove the focused item.
       </div>