update doc

monitor.html

@@ -41,6 +41,12 @@
     <link rel="search" title="搜索" href="search.html" />
     <link rel="next" title="watch" href="watch.html" />
     <link rel="prev" title="redefine" href="redefine.html" />
+<script>
+  if (window.location.href.startsWith("https://alibaba.github.io/arthas/")) {
+      window.location.href = "https://arthas.aliyun.com/doc/" + window.location.href.substr("https://alibaba.github.io/arthas/".length);
+  }
+</script>
+
 <script src="_static/center_page.js"></script>
 <link rel="stylesheet" href="https://g.alicdn.com/code/lib/highlight.js/9.13.1/styles/github.min.css">