docs: Update google tag

Author: Jooa-GitHub

docs/.vuepress/config.ts

@@ -9,6 +9,21 @@ export default defineUserConfig({
   theme,
   base: "/",
   head: [
+    [
+      "script",
+      {
+        async: true,
+        src: "https://www.googletagmanager.com/gtag/js?id=G-9QM0DWGFXG",
+      },
+    ],
+    [
+      "script",
+      {},
+      `window.dataLayer = window.dataLayer || [];
+function gtag(){dataLayer.push(arguments);}
+gtag('js', new Date());
+gtag('config', 'G-9QM0DWGFXG');`,
+    ],
     [
       "script",
       {