docs: add hotjar

Author: tangjinzhou

site/index.html

@@ -57,10 +57,7 @@
     <!-- Hotjar Tracking Code for http://vue.ant.design -->
     <script>
       (function(h, o, t, j, a, r) {
-        if (
-          location.href.indexOf('iframe') === -1 &&
-          (location.host === 'ant-design-vue.gitee.io' || location.host === 'vue.ant.design')
-        ) {
+        if (location.href.indexOf('iframe') === -1) {
           h.hj =
             h.hj ||
             function() {