fix: typo (close: #1)

Author: ulivz

lib/index.js

@@ -91,7 +91,7 @@ function getRedirectHtml({ /* url, */redirectUrl, countdown, routerBase = '/' }
   ${countdown > 0
       ? `
 <p align="center" style="font-size: 30px;">
-  Redrect after <b><span id="countdown">${countdown}</span></b>s
+  Redirect after <b><span id="countdown">${countdown}</span></b>s
 </p>
 <p align="center">
   <small>Powered by <a target="_blank" href="https://github.com/vuepressjs/vuepress-plugin-html-redirect">vuepress-plugin-redirect</a></small>