fix: Disqus username

Author: ktquez

src/.vuepress/config/head.js

@@ -62,7 +62,7 @@ module.exports = [
   ['link', { rel: 'preconnect', href: 'https://fonts.googleapis.com/' }],
   ['link', { rel: 'preconnect', href: 'https://c.disquscdn.com/' }],
   ['link', { rel: 'preconnect', href: 'https://disqus.com/' }],
-  ['link', { rel: 'preconnect', href: 'http://vue-a11y-test.disqus.com' }],
+  ['link', { rel: 'preconnect', href: 'https://vue-a11y.disqus.com' }],
   ['link', { rel: 'preconnect', href: 'https://c.disquscdn.com/next/' }],
   ['link', { rel: 'preconnect', href: 'https://links.services.disqus.com/api/' }],
   ['link', { rel: 'preconnect', href: 'https://www.google-analytics.com/' }],

src/.vuepress/theme/layouts/Post.vue

@@ -162,7 +162,7 @@ export default {
     }))
 
     const disqus = {
-      shortname: 'vue-a11y-test',
+      shortname: 'vue-a11y',
       lazyConfig: {
         root: null,
         rootMargin: '1000px',