doc: add mirror site #649

Author: jaywcjlove

template/contributors.ejs

@@ -216,6 +216,7 @@
   </div>
   <h1>魔改网站</h1>
   <div class="links">
+    <a target="_blank" href="https://witnect.top/">witnect.top</a>
     <a target="_blank" href="https://linux.lylme.com/">lylme.com</a>
     <a target="_blank" href="https://linux.ftqq.com/">linux.ftqq.com</a>
     <a target="_blank" href="https://linux.gaomeluo.com">linux.gaomeluo.com</a>