Merge pull request #75 from atcoder/patch/issue74

fix #74: fix an url of uikit

Author: yosupo06

tools/template_head.html

@@ -5,9 +5,11 @@
     <meta charset="UTF-8">
     <!-- Uikit -->
     <meta name="viewport" content="width=device-width, initial-scale=1">
-    <link rel="stylesheet" href="https://judge.yosupo.jp/public/css/uikit.min.css" />
-    <script src="https://judge.yosupo.jp/public/js/uikit.min.js"></script>
-    <script src="https://judge.yosupo.jp/public/js/uikit-icons.min.js"></script>
+    <!-- UIkit CSS -->
+    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/uikit@3.5.10/dist/css/uikit.min.css" />    
+    <!-- UIkit JS -->
+    <script src="https://cdn.jsdelivr.net/npm/uikit@3.5.10/dist/js/uikit.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/uikit@3.5.10/dist/js/uikit-icons.min.js"></script>
     <!-- Katex -->
     <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.10.2/dist/katex.min.css"
         integrity="sha384-yFRtMMDnQtDRO8rLpMIKrtPCD5jdktao2TV19YiZYWMDkUR5GQZR/NOVTdquEx1j" crossorigin="anonymous">