chore: add google adsense [skip ci]

Author: ThinLiquid

index.html

@@ -6,6 +6,8 @@
     <title>FlowOS</title>
     <link rel="shortcut icon" href="./src/assets/flow.png" type="image/png">
 
+    <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-9675905177363247" crossorigin="anonymous"></script>
+    
     <!-- Google tag (gtag.js) -->
     <script async src="https://www.googletagmanager.com/gtag/js?id=G-X4XVQRWEVM"></script>
     <script>