fix: Correct CardTitle ref type to HTMLHeadingElement

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

apps/docs/components/ui/card.tsx

@@ -29,7 +29,7 @@ const CardHeader = React.forwardRef<
 CardHeader.displayName = "CardHeader"
 
 const CardTitle = React.forwardRef<
-  HTMLParagraphElement,
+  HTMLHeadingElement,
   React.HTMLAttributes<HTMLHeadingElement>
 >(({ className, ...props }, ref) => (
   <h3