Update the home page to display a new banner ad

Updates the AdSenseAd component on the home page to use adSlot "8519166886" and adFormat "auto", replacing the previous horizontal ad configuration.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 946a0075-7e32-454b-b348-9e7f576d7f45
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/60d372ff-2c10-46c7-b01b-10c3435136b0/946a0075-7e32-454b-b348-9e7f576d7f45/eNJCYo3

client/src/pages/home.tsx

@@ -227,10 +227,8 @@ export default function Home() {
       <div className="container py-4 border-t border-white/10">
         <div className="flex justify-center">
           <AdSenseAd 
-            adSlot="1234567892"
-            adFormat="horizontal"
-            width={728}
-            height={90}
+            adSlot="8519166886"
+            adFormat="auto"
             className="max-w-full"
           />
         </div>