fix: enforce rel="noopener" for external _blank targets` (#2348)

Author: hiendv

themes/vue/layout/partials/resources_dropdown.ejs

@@ -3,6 +3,6 @@
   <ul class="nav-dropdown">
     <li><a href="<%- url_for("/resources/partners.html") %>" class="nav-link">Partners</a></li>
     <li><a href="<%- url_for("/resources/themes.html") %>" class="nav-link">Themes</a></li>
-    <li><a href="https://github.com/vuejs/awesome-vue" class="nav-link" target="_blank">Awesome Vue</a></li>
+    <li><a href="https://github.com/vuejs/awesome-vue" class="nav-link" target="_blank" rel="noopener">Awesome Vue</a></li>
   </ul>
 </li>

themes/vue/layout/search-page.ejs

@@ -12,7 +12,7 @@
           <strong>{{ totalResults }} results</strong> found in {{ queryTime }}ms
         </template>
       </p>
-      <a target="_blank" href="https://www.algolia.com/" aria-label="Search">
+      <a target="_blank" rel="noopener" href="https://www.algolia.com/" aria-label="Search">
           <img src="/images/search-by-algolia.png" height="16">
       </a>
     </div>