Update app.py

Title text blue-purple gradient

app.py

@@ -426,7 +426,7 @@ body {
 }
 .custom-title {
     font-size: 36px;
-    background: #1E2125 text;
+    background: linear-gradient(90deg, rgb(29, 161, 255) 0%, rgb(163, 44, 255) 56%, rgb(251, 156, 255) 100%) text;
     -webkit-background-clip: text;
     -webkit-text-fill-color: transparent;
     font-weight: bold;