examples: Fix with-turbopack typo (#42410)

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## Bug

- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have a helpful link attached, see `contributing.md`

## Feature

- [ ] Implements an existing feature request or RFC. Make sure the
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- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
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## Documentation / Examples

- [ ] Make sure the linting passes by running `pnpm build && pnpm lint`
- [ ] The "examples guidelines" are followed from [our contributing
doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md)

examples/with-turbopack/app/hooks/[categorySlug]/[subCategorySlug]/page.tsx

@@ -4,7 +4,7 @@ import { SkeletonCard } from '@/ui/SkeletonCard';
 
 export default function Page({ params }: PageProps) {
   const category = use(
-    fetchSubCategory(params.categorySlug, params.subCategory),
+    fetchSubCategory(params.categorySlug, params.subCategorySlug),
   );
   if (!category) return null;
   return (