fix: Combobox docs placeholder string (#9390)

Author: snowystinger

packages/dev/s2-docs/pages/react-aria/ComboBox.mdx

@@ -20,7 +20,7 @@ export const description = 'Combines a text input with a listbox, allowing users
 <PageDescription>{docs.exports.ComboBox.description}</PageDescription>
 
 <ExampleSwitcher>
-  ```tsx render docs={vanillaDocs.exports.ComboBox} links={vanillaDocs.links} props={['label', 'isDisabled']} initialProps={{label: 'Favorite Animal', placeholder: 'Select a flavor'}} type="vanilla" files={["starters/docs/src/ComboBox.tsx", "starters/docs/src/ComboBox.css"]}
+  ```tsx render docs={vanillaDocs.exports.ComboBox} links={vanillaDocs.links} props={['label', 'isDisabled']} initialProps={{label: 'Favorite Animal', placeholder: 'Select an animal'}} type="vanilla" files={["starters/docs/src/ComboBox.tsx", "starters/docs/src/ComboBox.css"]}
   "use client";
   import {ComboBox, ComboBoxItem} from 'vanilla-starter/ComboBox';
 
@@ -34,7 +34,7 @@ export const description = 'Combines a text input with a listbox, allowing users
   </ComboBox>
   ```
 
-  ```tsx render docs={vanillaDocs.exports.ComboBox} links={vanillaDocs.links} props={['label', 'isDisabled']} initialProps={{label: 'Favorite Animal', placeholder: 'Select a flavor'}} type="tailwind" files={["starters/tailwind/src/ComboBox.tsx"]}
+  ```tsx render docs={vanillaDocs.exports.ComboBox} links={vanillaDocs.links} props={['label', 'isDisabled']} initialProps={{label: 'Favorite Animal', placeholder: 'Select an animal'}} type="tailwind" files={["starters/tailwind/src/ComboBox.tsx"]}
   "use client";
   import {ComboBox, ComboBoxItem} from 'tailwind-starter/ComboBox';