fix: update icon for plan component

Author: peoray

apps/www/content/2.components/plan.md

@@ -1,7 +1,7 @@
 ---
 title: Plan
 description:
-icon: lucide:send
+icon: lucide:map
 ---
 
 The `PromptInput` component provides a flexible system for displaying AI-generated execution plans with collapsible content. Perfect for showing multi-step workflows, task breakdowns, and implementation strategies with support for streaming content and loading states.