style: update Publications metric counter label to 220+

refer_landing_page/app/page.tsx

@@ -91,7 +91,7 @@ export default function HomePage() {
               </div>
               <div>
                 <div className="font-serif text-3xl text-cobalt font-normal">
-                  {pubCount}
+                  220+
                 </div>
                 <div className="font-mono text-xs text-ink-mute uppercase tracking-wider mt-1">
                   Publications