Update header.astro

Author: sameehaafr

src/components/header.astro

@@ -10,7 +10,7 @@ const navItems: Array<NavItem> = [
   { title: "About", url: "/about" },
   { title: "Projects", url: "https://mlpurdue.notion.site/8e83150770684e118ed6f423ba54fb81" },
   { title: "Events", url: "/#eventscalendar" },
-  { title: "AIGuide Blog", url: "/blog"},
+  { title: "AIGuide Blog", url: "https://mlpurdue.notion.site/AI-For-Beginners-Blog-3a61d558975c40609c1807eef0b5a1cc"},
   { title: "Sponsor", url: "/sponsor"},
   { title: "Contact", url: "/contact" },
   { title: "Archive", url: "/events-archive" },