Update app.py

app.py

@@ -1410,7 +1410,7 @@ technical:: Advertisement-grade photograph, ${objectLighting} designed to accent
         btn.innerHTML = "ПРОМПТ СКОПИРОВАН. ЗАПУСК... 🚀";
 
         setTimeout(() => {
-            window.open('https://lmarena.ai/ru?chat-modality=image&mode=direct', '_blank');
+            window.open('https://arena.ai/ru?chat-modality=image&mode=direct', '_blank');
             setTimeout(() => {
                 btn.style.backgroundImage = "";
                 btn.innerHTML = originalText;