add qq group number

Author: dingyiming

themes/vue/layout/partials/header.ejs

@@ -17,7 +17,7 @@
     letter-spacing: 1px;
     box-shadow: 0 1px 2px rgba(0,0,0,.3);
   ">
-  工作正在进行中...
+  进群参与翻译:427447379
   </span>
   <ul id="nav">
     <%- partial('partials/main_menu', { context: 'nav' }) %>