target maintenance content independently of decorative icons

app/assets/styles/deni.css

@@ -41,7 +41,7 @@
   background: var(--p-yellow-100);
   color: var(--p-yellow-900);
 }
-.deni-layout .maintenance-banner > span {
+.deni-layout .maintenance-message {
   min-width: 0;
   overflow-wrap: anywhere;
 }