ui: use specific LineIcons CDN version and scripts

Author: Datanoise

server/templates/admin.html

@@ -4,7 +4,9 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>TinyIce Admin</title>
-    <link href="https://cdn.lineicons.com/lineicons.css" rel="stylesheet">
+    <link rel="stylesheet" href="https://cdn.lineicons.com" />
+    <link href="https://cdn.jsdelivr.net/npm/lineicons@1.3.2/dist/lineicons.min.css" rel="stylesheet">
+    <script src="https://cdn.jsdelivr.net/npm/lineicons@1.3.2/dist/lineicons.min.js"></script>
     <style>
         :root {
             --bg: #0b0f1a; --surface: #161b2c; --surface-hover: #1e253a;