Update unocss example

Author: ije

examples/feature-apps/unocss/index.html

@@ -27,6 +27,9 @@
       width: 100%;
       height: 100%;
     }
+    a {
+      color: inherit;
+    }
   </style>
   <ssr-head>
 </head>

examples/feature-apps/unocss/server.tsx

@@ -1,5 +1,5 @@
-import presetUno from "https://esm.sh/@unocss/preset-uno@0.30.12";
-import presetIcons from "https://esm.sh/@unocss/preset-icons@0.30.12?no-require";
+import presetUno from "https://esm.sh/@unocss/preset-uno@0.31.6";
+import presetIcons from "https://esm.sh/@unocss/preset-icons@0.31.6?no-require";
 import carbonIcons from "https://esm.sh/@iconify-json/[email protected]/icons.json" assert { type: "json" };
 import { renderToString } from "react-dom/server";
 import { Router } from "aleph/react";