change analytics hosting to vercel

Author: huijing

src/layouts/BaseLayout.astro

@@ -107,8 +107,8 @@ const {
     <link rel="monetization" href="https://ilp.gatehub.net/747467740/USD" />
 
     <script
-      async
-      src="https://fluffy-analytics.herokuapp.com/script.js"
+      defer
+      src="https://fluffy-analytics.vercel.app/script.js"
       data-website-id="0e80b94a-ebdf-426e-bac1-c69fd692974a"></script>
   </head>